The probability that children of the couple will be affected by achondroplasia is 2/3
Probability is synonymous with possibility. It is a mathematical branch that deals with the occurrence of a random event.
Probability is a measure of how likely an event is to occur. Many events are impossible to predict with absolute certainty. We can only predict the chance of an event occurring, i.e. how likely they are to occur, using it. Probability can range from 0 to 1, with 0 indicating an impossible event and 1 indicating a certain even.
According to the probability formula, the likelihood of an event occurring is equal to the ratio of the number of favorable outcomes to the total number of outcomes.
The question is incomplete . The complete question is
Narrative:
Achondroplasia, a hereditary form of dwarfism, is an autosomal dominant disorder; however homozygous dominant individuals either die before birth or very shortly thereafter. The homozygous recessive condition is normal. A dwarf couple decide to have children. Use this information to answer the following question:
Of the children of this couple who survive, what is probability that they will be affected by achondroplasia?
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Instructions 1 Given the following information, answer the questions. Output per worker is 100 K VN The savings rate is 20%. The depreciation rate is 4%. Question 1 1 pts Calculate output per worker il capitale workeris 40.000 0 DO Question 2 1 pts Calculate Investment per werkeri coital per workers O,000. Hint Use your answer to the previous question D Question 3 1 pts Calculate the amount of depreciation or worker cooper workeris 40,000 D Question 4 1 pts Calculate netestit capital or workeris 40.000 Question 5 1 pts Is capital per weer growing, tating or staying the son of capitale workers 40.000 Grow For Site D Question 1 pts Castle capitair wurer D Question 7 1 pts Calculate net investment if capital per worker is 360,000.
The answers based on the given information:
1. Output per worker (Y/L) is given as 100. Capital per worker (K/L) is given as 40,000.
2. Investment per worker (I/L) can be calculated using the savings rate (s). I/L = s * (Y/L). Since the savings rate is 20% (0.20), I/L = 0.20 * 100 = 20.
3. Depreciation per worker can be calculated using the depreciation rate (d) and capital per worker (K/L). Depreciation per worker = d * (K/L). Since the depreciation rate is 4% (0.04), Depreciation per worker = 0.04 * 40,000 = 1,600.
4. Net investment per worker can be calculated by subtracting depreciation per worker from investment per worker. Net investment per worker = (I/L) - Depreciation per worker = 20 - 1,600 = -1,580.
5. Since the net investment per worker is negative, capital per worker is decreasing.
7. If capital per worker is 360,000, net investment can be calculated by multiplying the savings rate by the new output per worker (assuming it stays the same) and then subtracting the depreciation. Net investment = (s * (Y/L)) - (d * 360,000) = (0.20 * 100) - (0.04 * 360,000) = 20 - 14,400 = -14,380.
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20 Points' !
A school group wants to rent part of a bowling alley to have a party. The bowling alley costs $500 to rent, plus an additional charge of $5 per student to bowl. The group doesn’t want any student to pay more than $15 total to attend this party.
What is an inequality that could represent this situation?
Answer:
7
Step-by-step explanation:
Can someone help, please?!
Answer:
one solution
Step-by-step explanation:
Write an explicit formula for an, the nth term of the sequence 32, -16, 8, ...-
The formula is an = 32 + (n - 1)(-48), which simplifies to an = (-1/2)^(n-1) × 32.
What is formula?A formula is a mathematical expression used to calculate the value of a variable based on given values. Formulas can be used to describe relationships between variables, and can be used to represent a wide range of functions.
This is an arithmetic sequence, which means that the difference between consecutive terms is constant. In this sequence, the difference between consecutive terms is -48. Therefore, the explicit formula for the nth term of the sequence is an = (-1/2)^(n-1) × 32, where n is the position of the term in the sequence.
This formula can be derived by looking at the first two terms of the sequence: 32 and -16. The difference between them is 48, which means that the common difference of the sequence is -48. Therefore, the next term in the sequence is -16 - (-48) = 32. This follows the pattern of the general explicit formula for an arithmetic sequence, an = a1 + (n - 1)d, where a1 is the first term in the sequence, n is the position of the term in the sequence, and d is the common difference. So, for this sequence, the formula is an = 32 + (n - 1)(-48), which simplifies to an = (-1/2)^(n-1) × 32.
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find f '(2), where f(t) = u(t) · v(t), u(2) = 1, 2, −2 , u'(2) = 5, 1, 6 , and v(t) = t, t2, t3 . f '(2) =
f'(2) is equal to 11 calculated by using product rule of differentiation.
The product rule is a formula used to find the derivative of a product of two functions. It states that the derivative of the product of two functions u(x) and v(x) is equal to u(x) times the derivative of v(x) plus v(x) times the derivative of u(x), or mathematically:
d/dx(uv) = u(dv/dx) + v(du/dx)
To find f'(2), we need to use the product rule for differentiation:
f'(t) = u'(t)v(t) + u(t)v'(t)
Substituting the given values, we get:
f'(t) = 5t + 2t^2u(2) + 3t^3u(2)
Since u(2) = 1, 2, −2 and v(t) = t, t^2, t^3, we get:
f'(t) = 5t + 2t^2 + 3t^3
Substituting t = 2, we get:
f'(2) = 5(2) + 2(2^2) + 3(2^3) = 11
Therefore, the answer is f'(2) = 11.
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Tekan-Tekan Sdn. Bhd. has order for 200 Model AS-120 calculator for delivery on day 200. The calculator consists of three parts. Components 2 and 3 form subassembly 1 . Sub-assembly 1 and component 4 form the final assembly. Following are the work centers and times of each operation. Table Q3(a) shows routine file of the operation. Assuming: - Only one machine is assigned to each operation - The factory works on 8-hour shift, 5 days a week - All parts move in one lot of 200. (a) Illustrate the backward schedule based on the information given above. (12 marks) (b) Identify when component 3 must be started to meet the delivery date. (2 marks)
Component 3 must be started on day 197 to meet the delivery date of day 200.
To illustrate the backward schedule, we need to start from the delivery date (day 200) and work our way backward, taking into account the lead times and dependencies of each operation.
(a) Backward schedule:
Operation | Work Center | Time (hours) | Start Day
--------------------------------------------------------
Final Assembly | Work Center 1 | 1 | 200
Sub-assembly 1 | Work Center 2 | 2 | 199
Component 4 | Work Center 3 | 3 | 197
Component 2 | Work Center 4 | 4 | 196
Component 3 | Work Center 5 | 3 | ????
(b) To identify when component 3 must be started to meet the delivery date, we need to consider its dependencies and lead times.
From the backward schedule, we see that component 3 is required for sub-assembly 1, which is scheduled to start on day 199. The time required for sub-assembly 1 is 2 hours, which means it should be completed by the end of day 199.
Since component 3 is needed for sub-assembly 1, we can conclude that component 3 must be started at least 2 hours before the start of sub-assembly 1. Therefore, component 3 should be started on day 199 - 2 = 197 to ensure it is completed and ready for sub-assembly 1.
Hence, component 3 must be started on day 197 to meet the delivery date of day 200.
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which expression is equivalent to 5^6
a.125 x 125 b. 6 x 5 c. 35 x 6 x 6 x 6 d. 25 x 5 x 5 x 5
The expression that is equivalent to 5^6 is A.125 x 125
What are index forms?Index forms are defined as mathematical forms of writing numbers that are too large or small in more convenient forms.
Other terms for index forms are called standard forms or scientific notations.
They are also described as numbers or variables that are raised to an exponent.
From the information given, we have that;
5⁶
This is replicating 5 in 6 places, we have the representation as;
5 × 5 × 5 × 5 × 5 × 5
Hence, the expression is 125 x 125
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Keisha has two dogs. The larger dog weighs 1.2 pounds more than the smaller dog. The combined weight of the two dogs is 13.6 pounds. What is the weight, in pounds, of the smaller dog?
Answer:
x = 6.2
Step-by-step explanation:
let ‘x’ denotes the weight of a smaller dog.
“1.2″ + x” be the weight of the larger dog
combined weight = 13.6
smaller dog weight =
x+x+1.2 = 13.6
2x + 1.2 = 13.6
2x = 13.6–1.2
2x = 12.4
x = 12.4/2
x = 6.2 pounds.
Hope you understood it, Happy Learning.
HELP! Write an equation in slope intercept form of the line that passes through (-7, 2) and is perpendicular to the graph of y= -1/2x+3
Answer:
y=2x+16
Step-by-step explanation:
finally got it lol
PLEASE Simplify the given expression. -1.3f+0.4j-12-1+2.9f=
Answer:
1.6f+0.4j-13
Step-by-step explanation:
This is the correct answer hope that helped
Trinagle abc is similar to triangle def. The following ratios of corresponding sides are equal. 8/10 = 16/20 = 4x+6/4x+11
The value of x is 0. This means that \(8/10 = 16/20 = 4x+6/4x+11\), so the corresponding sides of triangles abc and def have the same ratio.
The similarity of two triangles can be determined by the ratio of their corresponding sides. In the case of triangles abc and def, the ratio of corresponding sides is \(8/10 = 16/20 = 4x+6/4x+11\).
To calculate the value of x, we can use the first two ratios and cross-multiply. With 8/10 = 16/20, we get 8*20=16*10, which simplifies to 160=160. Therefore, the first two ratios are equal.
To calculate the value of x using the third ratio, we can use the same method. With 4x+6/4x+11, we get (\(4x+6)*(4x+11)=4x^2+44x+66\). This simplifies to \(4x^2+44x+66=4x^2+44x+66\), so the third ratio is also equal.
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Complete question:
What is the value of x in the ratio 8/10 = 16/20 = 4x+6/4x+11?
Simplify the ratio: (Hint: There are 3 feet in a yard)
18 yards : 12 feet
A) 2/3
B) 9/2
C) 18/4
D) 4/3
Answer:
B) 9/2
Step-by-step explanation:
18 yards would be 54 feet
54:12 Divide both numbers by 6
9:2
Graph the curve x = cos t + 2 cos 2t, y = sin t + 2 sin 2t to discover where it crosses itself. Find equations of both tangents at that point.
For given parametric curve the equations of both tangents at point where it crosses itself are: y = ± (√15x + 2√15)
The graph of parametric curve x = cos t + 2 cos 2t, y = sin t + 2 sin 2t (t ∈ [0, 2π]) is as shown below.
From the graph we can observe that, the curve crosses itself at (-2, 0).
Let x = -2
cos t + 2 cos 2t = -2,
and y = 0
sin t + 2 sin 2t = 0
sin t + 2 (2 sin(t) cos(t)) = 0
sin t + 4 sin t cos t = 0
sin t(1 + 4 cos t) = 0
sin(t) = 0 OR 1 + 4 cos(t) = 0
sin(t) = 0 OR cos(t) = -1/4
From sin(t) = 0
⇒ t = 0 or t = π,
but for these values of t, cos t + 2 cos 2t = -2 is not true.
This means, the point (-2, 0) must corresponds to cos(t) = -1/4
\(\Rightarrow t=cos^{-1}(\frac{1}{4} )\)
When cos(t) = -1/4,
sin(t) = \(\frac{\sqrt{15} }{4}\) ..............(by identity sin²(t) + cos²(t) = 1)
And
\(sin(2t) = 2sin(t)cos (t)\\sin(2t) = 2\times \frac{\sqrt{15} }{4} \times (\frac{-1}{4} )\\\\sin(2t) = -\frac{\sqrt{15} }{8}\)
\(\\\\cos(2t)=2cos^2{t} - 1\\\\cos(2t)=2(\frac{-1}{4} )^2 - 1\\\\cos(2t)=\frac{1}{8}-1\\\\ cos(2t)=\frac{-7}{8}\)
Now we find derivative of given parametric equations with respect to t.
for x = cos t + 2 cos 2t,
dx/dt = -sin(t) -4 sin(2t)
y = sin t + 2 sin 2t
dy/dt = cos(t) + 4 cos(2t)
Consider dy/dx
\(= \frac{\frac{dy}{dt} }{\frac{dx}{dt} }\\\\= \frac{cos(t) + 4 cos(2t) }{-sin(t) -4 sin(2t)}\\\\=\frac{\frac{-1}{4}+4~\frac{-7}{8} }{-\frac{\sqrt{15} }{4}-4~\frac{\sqrt{15} }{8} }\\\\=-\sqrt{15}\)
This means, slope m = -√15
We have the point (−2,0)
Using equation of line y=mx+b the y-intercept would be,
0 = -√15 (−2) + b
b = -2√15
So, the equation for this tangent line :
y = -√15x - 2√15
And the equation of other tangent would be,
y = √15x + 2√15
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please help with a. of this math question!!!
do you think it could be x+y=800
What is the volume, in cubic inches, of the cylinder below?
Answer:
\(\boxed{\mathrm{108 \pi \;cubic\; inches}}\)
3rd Choice
Step-by-step explanation:
Volume of a cylinder V is given by the equation:
\(V = \pi r^2h\\\\\textrm{where r = radius of the cylinder}\\\\\textrm{and, h = height of the cylinder}\\\\\)
\(\textrm{From the diagram we see the diameter of the cylinder = 6 in }\\\\\mathrm{radius = \dfrac{diameter}{2} }\\\\\mathrm {So\; radius = \dfrac{6}{2} = 3\;in}\\\\\)
\(\mathrm{h = 12\;in}\\\\\\\\\mathrm{V= \pi \cdot 3^2 \cdot 12}\\\\\mathrm{V = \pi \cdot 9 \cdot 12}\\\\\mathrm{V = 108 \pi}\)
Answer
Volume of cylinder = \(\boxed{\mathrm{108 \pi \;cubic\; inches}}\)
Graph -23 +y = 8.
y
8
9
8+
7+
6+
4+
3+
2+
1+
2
-9-8-7 -6 -5 -4 -3 -2.
1 2 3 4 5 6 7 8 9
-2+
-3+
-4+
-5+
-6t
-7+
Answer:
in the proprety of the number of negs and postive and y the graph -23+y=8 being that the nuber is -15
Patrick won a sweepstakes and will receive money each week for 52 weeks. The first week he will receive $10. Every week after that he will receive 10% more than he got the previous week. How much money did he receive over the 52 weeks?
Patrick received a total of approximately $6,785.97 over the course of 52 weeks.
To calculate the total amount of money Patrick received over the 52 weeks, we can use the concept of a geometric sequence. The first term of the sequence is $10, and each subsequent term is 10% more than the previous term.
To find the sum of a geometric sequence, we can use the formula:
Sn = a * (r^n - 1) / (r - 1),
where Sn is the sum of the first n terms, a is the first term, r is the common ratio, and n is the number of terms.
In this case, a = $10, r = 1 + 10% = 1.1 (common ratio), and n = 52 (number of weeks).
Plugging these values into the formula, we can calculate the sum of the sequence:
S52 = 10 * (1.1^52 - 1) / (1.1 - 1)
After evaluating this expression, we find that Patrick received approximately $6,785.97 over the 52 weeks.
As a result, Patrick collected about $6,785.97 in total over the course of 52 weeks.
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Express 2x2 – 3x – 5 as the product of two binomial factors.
Answer:
(2x-5) (x+1)Step-by-step explanation:
Express 2x2 – 3x – 5 as the product of two binomial factors.
factorize the given expression
2x^2 – 3x – 5
2x^2 – 5x+2x – 5
x(2x-5)+ 1 (2x-5)
(2x-5) (x+1)
Hence the expression as the product of two binomial is (2x-5) (x+1)
50% of 25% is the number. What is the number?
Answer:
1/8
Step-by-step explanation:
50/100 * 25/100
1/2 * 1/4 = 1/8
Fiona wants to earn at least $100 this week. She makes $11 an hour babysitting. Choose the inequality that shows the number of hours Fiona needs to babysit in order to reach her goal.
h≥11
h>9
h>8
h≥9
The inequality that shows the number of hours Fiona needs to babysit in order to reach her goal is h>9.
What is inequality?
The idea of inequality, which is the state of not being equal, especially in terms of status, rights, and opportunities1, is at the core of social justice theories. However, because it frequently has diverse meanings to different people, it is prone to misunderstanding in public discourse.
Given that,
Fiona wants to earn at least \(\$\)100
She makes \(\$\)11/hour
in order to reach her goal = 100/11 = \(\$\)9.09 .
The inequality that shows the number of hours Fiona needs to babysit in order to reach her goal is h>9.
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f(x+h)-f(x) Find and simplify the difference quotient f(x) = -x²+3x+8 f(x+h)-f(x) h = h*0 for the given function.
The difference quotient `f(x+h)-f(x)` when `h=h*0` is `-x²`. We are given the function, `f(x) = -x²+3x+8` and we need to evaluate the difference quotient `f(x+h)-f(x)` where `h = h*0`.
The difference quotient `f(x+h)-f(x)` can be evaluated by substituting the given function `f(x) = -x²+3x+8` in it.
`f(x+h)-f(x)`= `[-(x+h)²+3(x+h)+8]-[-x²+3x+8]`
= `[-(x²+2xh+h²)+3x+3h+8]+[x²-3x-8]`
= `(-x²-2xh-h²+3x+3h+8)+(x²-3x-8)`
= `-x²+2xh-h²+3h`
Here, we need to simplify the expression `-x²+2xh-h²+3h` given that `h=h*0`.When `h=0`, we have `-x²+2xh-h²+3h` = `-x²+0-0+0` = `-x²`.
Therefore, the difference quotient `f(x+h)-f(x)` when `h=h*0` is `-x²`.
f(x+h)-f(x)`= `[-(x+h)²+3(x+h)+8]-[-x²+3x+8]`
= `[-(x²+2xh+h²)+3x+3h+8]+[x²-3x-8]`
= `(-x²-2xh-h²+3x+3h+8)+(x²-3x-8)`
= `-x²+2xh-h²+3h`
When `h=0`, we have `-x²+2xh-h²+3h` = `-x²+0-0+0` = `-x²`.
Therefore, the difference quotient `f(x+h)-f(x)` calculated when `h=h*0` is `-x²`.
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Julie has accumulated $1,000 in a bank savings account, which pays 2.7 percent interest. She investigates several options and finds that she can invest her money in a 1-year Treasury note paying 4.4 percent interest, a
1-vear CD paying 3.9 percent interest, or a money market mutual fund with an average yield of 3.7 percent. What are the pros and cons of each of these investment options?
Julie has $1,000 and wants to invest it. She has three options: 1-year Treasury note paying 4.4% interest, 1-year CD paying 3.9% interest, or money market mutual fund with an average yield of 3.7%. Pros of Treasury note are high interest rate but con is lack of flexibility. Pros of CD are lower risk and predictable return but con is lower interest rate. Pros of money market fund are liquidity and flexibility but con is lower interest rate.
The investment options available to Julie are 1-year Treasury note paying 4.4 percent interest This option offers the highest interest rate among the three options and is a low-risk investment as it is backed by the government. However, the money is locked in for one year, and there may be penalties for early withdrawal.
1-year CD paying 3.9 percent interest This option is also a low-risk investment, but the interest rate is slightly lower than the Treasury note. The money is also locked in for one year, and there may be penalties for early withdrawal.
Money market mutual fund with an average yield of 3.7 percent This option offers a slightly higher return than a savings account, but the risk level is slightly higher. The money can be withdrawn at any time without penalty, making it a more flexible option.
The pros of the Treasury note and CD options are higher interest rates and low-risk investments, while the cons are that the money is locked in for one year, and there may be penalties for early withdrawal.
The pros of the money market mutual fund are flexibility and slightly higher returns, while the cons are slightly higher risk and lower returns compared to the other two options. Julie should weigh the pros and cons of each option based on her personal financial goals and risk tolerance.
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At the movies, tickets cost $12 for adults and $7 for kids under 12. How many total
tickets would someone get if they purchased 2 adult tickets and 16 kids tickets? How
many total tickets would someone get if they purchased a adult tickets and k kids
tickets?
Total tickets, 2 adult tickets and 16 kids tickets:
Total tickets, a adult tickets and k kids tickets:
Answer:
18a+kStep-by-step explanation:
The total number of tickets is the sum of the number of adult tickets and the number of kid tickets.
Total tickets, 2 adult tickets and 16 kids tickets: 2 +16 = 18
Total tickets, a adult tickets and k kids tickets: a +k
_____
Additional comment
The total price is a different matter:
$12(2) +$7(16) = $136 . . . for 2 adult and 16 kids
12a +7k . . . for 'a' adults and 'k' kids
is 1.030030003 a whole number a natural number an integer a real number a rational number or irrational number
Real numbers are numbers that are continous on the number line. They include positive and negative numbers. They can be integers, natural numbers, rational or irrational numbers.
In this exercise the number 1.030030003 is a real number because it can be found on the real number line
It is also a rational number because it is a repeating decimal
(PLS HURRY!) On Melissa's 6th birthday, she gets a 2000$ CD that earns 6% interest, compounded. If the CD matures on her 14th birthday, how much money will be available?
Using compound interest formula when the CD matures on Melissa's 14th birthday, there will be $3187.69 available.
What is Compound Interest?The interest that is calculated using both the principal and the interest that has accrued during the previous period is called compound interest. It differs from simple interest in that the principal is not taken into account when determining the interest for the subsequent period with simple interest. Compound interest is commonly abbreviated C.I. in mathematics.
Use the formula for compound interest to calculate the amount of money that will be available when the CD matures -
\(A = P(1 + r/n)^(nt)\)
Where A is the amount of money available when the CD matures, P is the initial principal, r is the interest rate, n is the number of times the interest is compounded per year, and t is the time in years.
In this case, the initial principal is $2000, the interest rate is 6%, and the CD will be held for 8 years (from Melissa's 6th to 14th birthday).
It is not given how many times per year the interest is compounded, so assume it is compounded annually.
Using these values in the formula -
\(A = $2000(1 + 0.06/1)^(1*8)A = $2000(1.06)^8A = $3187.69\)
Therefore, the value is obtained as $3187.69.
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Solve for x
Show work please
Answer:
\(\tt x=5\)
Step-by-step explanation:
\(\tt 18x-5=13x+4x+1-11\)
\(\tt 18x-17x=15-10\)
\(\tt x=5\)
~
Work out the circumference of this circle.
to be 3.142 and write down all the digits given by your calculator.
21 cm
Answer:62.84Step-by-step explanation:pie=3.142c=pie * diameterr=10cmd=2rd=2(10)=20cmc=3.142 * 20c=62.84
Step-by-step explanation:
Help me out pleaseeeee
Answer:
I believe the best answer is 0.45
Answer:
Option 3: 0.45
Step-by-step explanation:
please solve this If you can thank U
Answer:
\( \huge{ \boxed{ \tt{1 }}}\)
❁ Question : Simplify :
\( \sf{( {x}^{a} ) ^{b - c} \times ( {x}^{b} ) ^{c - a} \times ( {x}^{c} )^{a - b}} \)❁ Solution :
First , Use power law of indices.
Remember : If \( \sf{ {a}^{m} }\) is an algebraic term , then
\( \sf{( {a}^{m} ) ^{n} } = {a}^{m \times n} = {a}^{mn} \) , where m and n are positive integers.
➝ \( \sf{ {x}^{a(b - c)} \times {x}^{b(c - a)} \times {x}^{c(a - b)}} \)
➝ \( \sf{ {x}^{ab - ac} \times {x}^{bc - ba} \times {x}^{ca - cb}} \)
Now , Use product law of indices :
Remember : If \( \sf{ {a}^{m} }\) and \( \sf{ {a}^{n}} \) are the two algebraic terms , where m and n are the positive integers then \( \sf{ {a}^{m} \times {a}^{n} = {a}^{m + n}} \)
➝ \( \sf{ {x}^{ab - ac + bc - ba + ca - cb}} \)
Since two opposites adds up to zero , remove them :
➝ \( \sf{ {x} \: ^{ \cancel{ab} \: - \cancel{ac} \: + \cancel{bc} \: - \cancel{ba} \: + \cancel{ca} \: - \cancel{cb} } }\)
➝ \( \sf{ {x}^{0} }\)
Use Law of zero index
Remember : If \( \sf{ {a}^{0}} \) is an algebraic term , where a ≠ 0 , then \( \sf{ {a}^{0} = 1}\)
➝ \( \boxed{ \sf{1}}\)
And we're done !
Hope I helped ! ♡
♪ Have a wonderful day / night ツ
~~
Q4
In this question solutions based entirely on graphical or numerical methods are not acceptable.
(a) Show that the equation
2sinetane - 3 = cose
can be written in the form
3 cos²0 + 3cos0 - 2 = 0
(b) Hence, solve, for 0 ≤ 0 < 360°, the equation
2sinetane - 3 = cose
Showing each stage of your working out and giving your answers in degrees, to one decimal place.
Consequently, the response to the equation 2sin(θ)tan(θ) - 3 = cos(θ) for 0 ≤ θ < 360° is: θ ≈ 83.4° (to one decimal place)
What is a mathematical sin?The sine function in mathematics is the relation of the hypotenuse's length to the opposing side's length in a correct triangle. To determine a right triangle's undetermined angle or sides, use the sine formula.
(a) We start with the given equation:
2sin(θ)tan(θ) - 3 = cos(θ)
We know that tan(θ) = sin(θ)/cos(θ), so we can substitute that in to get:
2sin(θ)(sin(θ)/cos(θ)) - 3 = cos(θ)
Simplifying this expression by multiplying both sides by cos(θ), we get:
2sin²(θ) - 3cos(θ) = cos²(θ)
Using the identity sin²(θ) + cos²(θ) = 1, we can substitute sin²(θ) = 1 - cos²(θ) to obtain:
2(1 - cos²(θ)) - 3cos(θ) = cos²(θ)
Simplifying further, we get:
2 - 2cos²(θ) - 3cos(θ) = cos²(θ)
Rearranging terms, we get:
3cos²(θ) + 3cos(θ) - 2 = 0
Therefore, we have shown that the given equation can be written in the form 3cos²(θ) + 3cos(θ) - 2 = 0.
(b) We can solve the equation 3cos²(θ) + 3cos(θ) - 2 = 0 using the quadratic formula:
cos(θ) = [-3 ± √(3² - 4(3)(-2))] / (2(3))
cos(θ) = [-3 ± √(33)] / 6
Using a calculator, we find that cos(θ) ≈ 0.2146 or cos(θ) ≈ -1.5479.
Since 0 ≤ θ < 360°, we know that cos(θ) is positive in the first and fourth quadrants, so we take the positive value of cos(θ):
cos(θ) ≈ 0.2146
To find sin(θ), we can use the identity sin²(θ) + cos²(θ) = 1:
sin(θ) = √(1 - cos²(θ))
sin(θ) ≈ √(1 - 0.2146²) ≈ 0.9763
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