Answer:
Step 2: Missy did not multiply the area of each face by 2 before adding.
Step-by-step explanation:
I took the test :)
Select all the expressions that equal 4×10^6
(2×10^8)(2×10^-2)
40×10^5
40^6
400,000
1.2×10^9/3×10^2
Answer:
(2×10^8)(2×10^-2)40×10^51.2×10^9/(3×10^2)Step-by-step explanation:
Your calculator or a spreadsheet can help you do this. The rules of exponents apply.
(10^a)(10^b) = 10^(a+b)
__
(2×10^8)(2×10^-2) = 4×10^6
40×10^5 = 4×10^6
40^6 = 4.096×10^9
400,000 = 4×10^5
1.2×10^9/3×10^2 = 4×10^10 or 1.2×10^9/(3×10^2) = 4×10^6 (see note)
_____
Note: A multiplier that is a power of 10 is one factor of a product. A product does not go into the denominator of a fraction unless it has parentheses around it. a/bc = (a/b)c ≠ a/(bc) (This is a consequence of the Order of Operations.)
Find value of x in trapezoid
Answer:
x = 1
Step-by-step explanation:
You want to know the value of x in the trapezoid with adjacent angles (43x+2)° and 135°.
Supplementary anglesThe two marked angles can be considered "consecutive interior angles" where a transversal crosses parallel lines. As such, they are supplementary.
(43x +2)° +135° = 180°
43x = 43 . . . . . . . . . . . . . . divide by °, subtract 137
x = 1 . . . . . . . . . . . . . . . divide by 43
The value of x is 1.
__
Additional comment
Given that the figure is a trapezoid, we have to assume that the top and bottom horizontal lines are the parallel bases.
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In 2010, the population of a city was 101,000. From 2010 to 2015, the population grew by 8%. From 2015 to 2020, it fell by 5.7%. To the nearest 100 people, what was the population in 2020? PLS GIVE EXPLANATION
The city's population in 2020 will be around 103,100 people.
How to determine the city population in 2020To Determine the population in 2015 after it increased by 8% since 2010:
Population in 2015 = 2010 population + (2010 population x Growth Rate)
In 2015, the population was 101,000 plus (101,000 x 0.08).
In 2015, the population was 109,080 people.
To Determine the population in 2020 after it has decreased by 5.7% since 2015:
Populationm in 2020 = 2015 population minus (2015 population x Fall Rate)
2020 population = 109,080 - (109,080 x 0.057)
2020 population = 103,080.60
Round the 2020 population to the next 100 people:
2020 Rounded Population = 103,100
As a result, the city's population in 2020 will be around 103,100 people.
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Find the missing side. 31° Z z = [?] Round to the nearest tenth. Remember: SOHCAHTOA 21
A²+B²= C²
31²+ 21²= z²
961+441 = z²
1402= z²
z= 37.443290454
transformation(s) can map APQR onto ASTU?
Which
O translation only
O rotation only
O rotation, then reflection
O reflection, then translation
15 POINTS IF YOU HELP ME!!!
2. The table shows a person saving money at a constant rate. Weeks 2 4 6 8 Total Savings ($) 70 140 210 280 How much will this person save in 77 days? Show your work. A $315 C $385 B $350 D $420
Answer:
it is 385$ because if you divide 70 by 2 you get 35 which is your constant rate so then you divide 77 by 7 to get the number of weeks(11) so then you multiply 11x35 to get the answer of 385
Step-by-step explanation:
70 divided by 2 = 35
77 divided by 7 = 11
35 times 7 = 385
Answer:
C. 385
Step-by-step explanation:
2/70 first you find out the rate by dividing both top and bottom by 2 and you get
1/35 that means every week he is saving $35
77 days = 11 weeks
so you do 11 * 1 = 11 and
11*35 which gets you
385
hope this helps, please make brainliest
f the characteristic polynomial of 3 matrix a factors into a product of linear factors. then a is diagonalizable.
The given statement is false. If the characteristic polynomial of a matrix A factors into a product of linear factors, then A is not necessarily diagonalizable.
By definition, a matrix A having characteristic F is diagonalizable if and only if the following 2 conditions are met-
the characteristic polynomial must factor into a product of linear terms in Ffor each eigenvalue λ, the dimension of the λ eigenspace must be equal to the multiplicity of λ as a root of the characteristic polynomial.Hence, we can conclude that the given statement is false. If the characteristic polynomial of a matrix A factors into a product of linear factors, then A is not necessarily diagonalizable.
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Can someone help me with some questions please!
Answer:
i would say around 61.54%
Step-by-step explanation:
maybe simplify it
Find the
perimeter of the triangle.
7 in.
(x + 4) in.
(4x
1) in.
Answer:
17
Step-by-step explanation:
Using the base angles theorem, \(x+4=4x+1 \implies x=1\).
So, the perimeter is \(4(1)+1+1+4+7=17\).
Answer the correct answer to this riddle to get brainliest
Goodluck!! (☞゚ヮ゚)☞ ☜(゚ヮ゚☜)
You use me all the time
You bring me everywhere you go
You pay almost all your money just to get me
I am your most prized possession
What am I?
help, try showing the work to please
Answer:
explanation
Step-by-step explanation:
4. 12 * b * 0 = 0
Anything multiplied by 0 is 0
5. 1 * m * 24 = 24m
24 * 1 = 24
24 * m = 24m
6. (t + 15) + 0 = t + 15
You can't add variables with constants.
A group of friends ate a meal in a restaurant, and the cost of their bill is m. Which expression represents the total amount that they'll pay if they tip 20%?
Question 4 options:
A)
1.2 + m
B)
0.2m
C)
1.2m
D)
0.2 + m
The expression that represents the total amount that they'll pay if they tip 20% will be 0.2 + m, because dollars are taxed. so option D is correct.
What does it mean to solve an equation?An equation represents equality of two or more mathematical expression.
When someone asks you to solve an equation, then they usually mean to find the values of the unknowns for which that equation would be true (the equality between expressions should hold true for those values).
Solutions to an equation are those values of the variables involved in that equation for which the equation is true.
It is given that a group of friends ate a meal in a restaurant, and the cost of their bill is m.
We need to find the expression that represents the total amount that they'll pay if they tip 20%.
So we know that,
20% = 0.20
The cost of their bill = m.
The total amount they'll pay including tip = 0.2 + m
Therefore, the expression that represents the total amount that they'll pay if they tip 20% will be 0.2 + m, because dollars are taxed. so option D is correct.
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What is the surface area of a right cone with a height of 4 centimeters
and with 3 centimeters as the radius of its base?
Answer:
\(24\pi \: {cm}^{2} \)
Step-by-step explanation:
Given:
A cone
h (height) = 4 cm
r (radius) = 3 cm
Find: A (surface area) - ?
In order to find the surface area, we have to know the length of the slant height first (use the Pythagorean theorem):
\( {l}^{2} = {r}^{2} + {h}^{2} \)
\( { l}^{2} = {3}^{2} + {4}^{2} = 9 + 16 = 25\)
\(l > 0\)
\(l = \sqrt{25} = 5 \: cm\)
Now, we can find the surface area:
\(a(surface) = \pi {r}^{2} + \pi \times r \times l\)
\(a(surface) = \pi \times {3}^{2} + \pi \times 3 \times 5 = 9\pi + 15\pi = 24\pi \: {cm}^{2} \)
Consider a binary classification problem for which you know that the conditional class probabilities are given by: P2 (t) = Pr (Y; = 1|X, = x) = and po (I) = Pr (Y; = 0[Xi = 1) = 1 - P: (I). Find the optimal Bayesian classifier. (Hint: Your classifier should be of the form: if Xe [a, b] then yi = 1, where a and b are two scalars you need to find).
The optimal Bayesian classifier is the one that minimizes the probability of misclassification. This can be achieved by choosing the class that has the highest posterior probability given the observed data. In this case, we need to compare the conditional class probabilities P2(t) and P0(I) for each data point and choose the class with the higher probability.
To find the optimal Bayesian classifier, we need to find the values of a and b that define the decision boundary between the two classes. This can be done by setting P2(t) = P0(I) and solving for x:
P2(t) = P0(I)
Pr(Y; = 1|X, = x) = Pr(Y; = 0[Xi = 1)
1 - P2(I) = P2(I)
2P2(I) = 1
P2(I) = 0.5
Now we can solve for x to find the decision boundary:
0.5 = Pr(Y; = 1|X, = x)
0.5 = P2(I)
x = a + b
Therefore, the optimal Bayesian classifier is of the form:
if Xe [a, b] then yi = 1
if Xe [b, a] then yi = 0
where a and b are the values of x that satisfy P2(I) = 0.5.
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For f(x) = 2(6)*, find y when x=2.
f(2)=
Answer:
I believe it is f(2) = 12
Step-by-step explanation:
I don't know if the * symbol is supposed to be an x but if it is, it would be 12x instead of 12.
Which is the correct value of Z for the solution to true system?
2x+3y-z=4
x-3y+2z=-3
3x+y-z=5
The correct value of Z for the solution to true system is -2
How to determine the correct value of Z for the solution to true system?From the question, we have the following parameters that can be used in our computation:
2x + 3y - z = 4
x - 3y + 2z = -3
3x + y - z = 5
Transform the third equation
So we have
2x + 3y - z = 4
x - 3y + 2z = -3
9x + 3y - 3z = 15
Eliminate y in the equations by subtraction
So we have
x - 3z = 7
10x - z = 12
Multiply x - 3z = 7 by 10
10x - 30z = 70
10x - z = 12
Subtract the equations
-29z = 58
So, we have
z = -2
Hence, the correct value of Z is -2
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Can anyone HELPppppp pleaseeee ? Will mark brainliest
The quadrilaterals have the following congruent angles: ∠ A ≅ ∠ W, ∠ B ≅ ∠ X, ∠ C ≅ ∠ Y, ∠ D ≅ ∠ Z.
How to determine the congruent angles in a system of similar figures
Herein we find the case of two similar quadrilaterals, that is, two quadrilaterals that have four pairs of congruent angles and four pairs of proportional sides.
Thus, by direct observation, we have the following conclusions on congruence of angles and proportionality of sides:
Angles
∠ A ≅ ∠ W
∠ B ≅ ∠ X
∠ C ≅ ∠ Y
∠ D ≅ ∠ Z
Sides
AB / XW = BC / XY = CD / YZ = AD / WZ
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One possible solution to a diminishing Social Security payroll is to decrease the Social Security benefit by 13%. How would such a decrease effect the benefits on a salary of $54,000?
a.
Benefit would decrease by $1,404 annually.
b.
Benefit would decrease by $7,020 annually.
c.
Benefit would decrease by $8,640 annually.
d.
Benefit would decrease by $15,660 annually.
The effect of the decrease on the salary of $54000 will be b. Benefit would decrease by $7,020 annually.
How to calculate the effectSocial security is the safety net that a society offers to individuals and families to ensure that they have access to health care and to assure financial stability, particularly in circumstances of old age, unemployment, illness, invalidity, work injuries, maternity, or the death of a primary earner.
One possible solution to a diminishing Social Security payroll is to decrease the Social Security benefit by 13%. The effect of the decrease will be:
= 13% × $54000
= $7020
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Solve: 2m³-5m² - 7m = 0
Answer:
m = - 1 , m = 0 , m = \(\frac{7}{2}\)
Step-by-step explanation:
2m³ - 5m² - 7m = 0 ← factor out common factor m from each term
m(2m² - 5m - 7) = 0
factorise the quadratic 2m² - 5m - 7
consider the factors of the product of the coefficient of the m² term and the constant term which sum to give the coefficient of the m- term
product = 2 × - 7 = - 14 and sum = - 5
the factors are + 2 and - 7
use these factors to split the m- term
2m² + 2m - 7m - 7 ( factor the first/second and third/fourth terms )
2m(m + 1) - 7(m + 1) ← factor out (m + 1) from each term
(m + 1)(2m - 7)
then
2m³ - 5m² - 7m = 0
m(m + 1)(2m - 7) = 0 ← in factored form
equate each factor to zero and solve for m
m = 0
m + 1 = 0 ( subtract 1 from both sides )
m = - 1
2m - 7 = 0 ( add 7 to both sides )
2m = 7 ( divide both sides by 2 )
m = \(\frac{7}{2}\)
solutions are m = - 1 , m = 0 , m = \(\frac{7}{2}\)
What additional information would allow you to prove the quadrilateral is a parallelogram according to the minimum criteria?
Question 5 options:
A)
||
B)
≅
C)
≅
D)
∠F ≅ ∠H
The additional information would allow you to prove the quadrilateral is a parallelogram according to the minimum criteria is
EJ ≅ GJ. Option A
How to prove the statementWe need to know the properties of a parallelogram, we have;
Opposite sides are parallel.Opposite sides are congruent.Opposite angles are congruent.Same-Side interior angles (consecutive angles) are supplementary.We know that FJ ≅ JH, it's given by the marks, now if it were to happen that EJ ≅ GJ, that would mean that the diagonals on that quadrilateral are bisecting each other, and if that's so, then the quadrilateral it's indeed a parallelogram.
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The complete question:
What additional information would allow you to prove the quadrilateral is a parallelogram according to the minimum criteria?
A)
ej ≅ gj
B)
ej || gj
C)
fg || eh
D)
ef ≅ hg
which property of exponents must you apply to the express p 1/2 to derive p as the result
The expression becomes: p^(1/2) = p^(1/2 * 1) = p^(1/2) Now we can simplify p^(1/2) as p^1/2 which equals the square root of p.
The property of exponents that must be applied to the expression p^(1/2) to derive p as the result is the Power of a Power Property.
The Power of a Power Property states that when a power is raised to another power, the exponents are multiplied.
For instance, consider the expression p^(1/2). We can apply the Power of a Power Property to this expression as follows: p^(1/2) = (p^(1/2))^1 By applying the Power of a Power Property, the exponent (1/2) is multiplied by the exponent 1, giving a result of 1/2.
Therefore, the expression becomes: p^(1/2) = p^(1/2 * 1) = p^(1/2)Now we can simplify p^(1/2) as p^1/2 which equals the square root of p.
So we have derived p as the result using the Power of a Power Property.
In summary, we must apply the Power of a Power Property to the expression p^(1/2) to derive p as the result.
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so can u help me guys
Thus, 715,000 = 7.15 x 10⁵, using the concept of scientific notations, both the values are found to be equal.
Explain about the scientific notations:The number of times that decimal point must be moved to obtain a number between 1 and 10 is the exponent in scientific notation. The decimal point is shifted to the left in order to represent this number in scientific notation.
The main goal of scientific notation is to simplify computations using numbers that are abnormally large or small. With scientific notation, every digit counts because zeros are just no longer used to denote the decimal point.
Given expression:
715,000 __ 7.15 x 10⁵
LHS = 715,000
Take the RHS value :
= 7.15 x 10⁵
This, can be simplifies as:
= 7.15 x 100,000
Now multiply the two values,
= 715,000 (RHS values)
as, LHS = RHS
LHS = 715,000
715,000 (RHS values)
Thus, 715,000 = 7.15 x 10⁵, using the concept of scientific notations, both the values are found to be equal.
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Find f '(x) of f(x) = 3/2x+4
Given:
\(f(x)=3\sqrt[]{2x+4}\)The objective is to find inverse of the function.
Consider the given function as,
\(y=3\sqrt[]{2x+4}\)The inverse of the function can be calculated by replacing the varibales x and y of the function.
Then, the function will be,
\(x=3\sqrt[]{2y+4}\)Now, solve for y.
\(\begin{gathered} \frac{x}{3}=\sqrt[]{2y+4} \\ 2y+4=(\frac{x}{3})^2 \\ 2y+4=\frac{x^2}{3^2}^{} \\ 2y=\frac{x^2}{9}^{}-4 \\ y=\frac{1}{2}(\frac{x^2}{9}^{}-4) \\ y=\frac{x^2}{18}^{}-\frac{4}{2} \\ y=\frac{x^2}{18}^{}-2 \end{gathered}\)Thus, the inverse function is,
\(f^{-1}(x)=\frac{x^2}{18}^{}-2\)Hence, the required inverse of the function is obtained.
An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in Texas. Suppose that the mean income is found to be $18.5 for a random sample of 2253 people. Assume the population standard deviation is known to be $6.1. Construct the 98% confidence interval for the mean per capita income in thousands of dollars. Round your answers to one decimal place.
Answer:
= ( $18.2, $18.8)
Therefore, the 98% confidence interval (a,b) = ( $18.2, $18.8)
Step-by-step explanation:
Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.
The confidence interval of a statistical data can be written as.
x+/-zr/√n
Given that;
Mean x = $18.50
Standard deviation r = $6.10
Number of samples n = 2253
Confidence interval = 98%
z(at 98% confidence) = 2.33
Substituting the values we have;
$18.5+/-2.33($6.1/√2253 )
$18.5+/-2.33($0.128513644290)
$18.5+/-$0.299436791196
$18.5+/-$0.3
= ( $18.2, $18.8)
Therefore at 98% confidence interval (a,b) = ( $18.2, $18.8)
Solve 2-3 cos x=5+3 cosx for 0° ≤ 180°
The equation 2-3cos(x) = 5+3cos(x) has no solution in the range of 0° to 180°.
1. Start with the given equation: 2-3cos(x) = 5+3cos(x).
2. Subtract 3cos(x) from both sides to isolate the constant term: 2-3cos(x) - 3cos(x) = 5.
3. Combine like terms: 2-6cos(x) = 5.
4. Subtract 2 from both sides: -6cos(x) = 3.
5. Divide both sides by -6: cos(x) = -1/2.
6. To find the solutions for cos(x) = -1/2 in the range of 0° to 180°, we need to determine the angles where cos(x) equals -1/2.
7. These angles are 120° and 240°, as cos(120°) = cos(240°) = -1/2.
8. However, the given equation states that 2-3cos(x) equals 5+3cos(x), which is not satisfied by cos(x) = -1/2.
9. Therefore, the equation 2-3cos(x) = 5+3cos(x) has no solution in the range of 0° to 180°.
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In the diagram, the parallel lines are cut by transversal BC−→−.If BD−→− bisects ∠ABC and m∠3 = 80, what is m∠ABD?
The value of m ∠ABD will be;
⇒ ∠ ABD = 50°
What are Parallel lines?Parallel lines are those lines that are equidistance from each other and never intersect each other.
Given that;
In the diagram, the parallel lines are cut by transversal BC.
And, BD bisects ∠ABC and m∠3 = 80.
Now,
Since, The parallel lines are cut by transversal BC.
Hence, We get;
⇒ ∠ 3 + ∠ 2 = 180°
⇒ 80° + ∠ 2 = 180°
⇒ ∠ 2 = 180 - 80
⇒ ∠ 2 = 100
And, We have;
⇒ ∠ 2 = ∠ ABC
⇒ ∠ ABC = 100°
Since, BD bisects ∠ABC.
Hence, We get;
⇒ ∠ ABD = 100 / 2
⇒ ∠ ABD = 50°
Thus, The value of m ∠ABD = 50°
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Please solve this equation algebraically and explain all the steps you did to find the answer.
6 - 4a = -10
PLEASE EXPLAIN ALL STEPS
Answer:
a = 4
Step-by-step explanation:
first, you are supposed to subtract both sides by 6 so you will get:
6 - 4a = -10
-6 -6
-4a = -16
Then, you divide both sides by -4 to cancel out the -4 before the "a"
-4a = -16
-4 -4
Last, you will get a = 4 and that is your answer because when you divide a negative number by another negative number, you will get a positive number.
S. Jamie was really struggling to multiply two digit numbers together. Mrs. Brack helped her with the
problem 13.(20•5) by multiplying 20 by 5 and then by 13, which is 1300. What property did Mrs. Brack
use?
The property applied is the associative property
Algebraic propertiesThere are several algebraic properties in mathematics; each of which have their own applications
Some of these properties are:
CommutativeDistributiveAssociativeIdentityThe mathematical expression is given as:
\(13 \cdot (20 \cdot 5)\)
And it is calculated as follows:
\(13 \cdot (20 \cdot 5) = 13 \cdot 100\)
\(13 \cdot (20 \cdot 5) = 13 00\)
The property applied above is the associative property
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Is anybody up to help me
Answer ASAP
question:
where is the question mam?
Find the area of a rectange with a base of 3/7 feet and a height of 9/10 feet
The area of the rectangle is 27/70 square feet.
Area of a rectangleThe area of a rectangle is given by the formula:
Area = base x height
Plugging in the given values, we get:
Area = (3/7) x (9/10)
Simplifying, we get:
Area = (27/70) square feet
Therefore, the area of the rectangle is 27/70 square feet.
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