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 = \(\frac{7}{2}\)
1 1/2 - 7/8 what is the answer i got 7/8 but it is wrong
Answer:
\( \frac{37}{8} \)
Step-by-step explanation:
\( \frac{11}{2} - \frac{7}{8} \)
LCM of denominator
\( = \frac{88 - 14}{16} \)
\( = \frac{74}{16} \)
reduce to lowest term
\( = \frac{37}{8} \)
A ladder of length (2x+6) feet is positioned x feet from a wall. If the ladder reaches a height of (2x+4) feet along the wall. Find the longest leg.
A. 10ft
B. 24ft
C. 26ft
D. 13cm
Using the Pythagoras theorem, the longest leg has the length of 24 feet.
Given that,
A ladder of length (2x+6) feet is positioned x feet from a wall.
Height of the ladder = (2x + 6) feet
Distance of ladder from the wall = x feet
Height of the wall that the ladder is placed = (2x + 4) feet
These three lengths form s right triangle where (2x + 6) feet is the hypotenuse.
Longest leg is (2x + 4) feet
Using the Pythagoras theorem,
(2x + 6)² = (2x + 4)² + x²
4x² + 24x + 36 = 4x² + 16x + 16 + x²
4x² + 24x + 36 = 5x² + 16x + 16
x² - 8x - 20 = 0
(x - 10) (x + 2) = 0
x = 10 or x = -2
x = 2 is not possible.
So x = 10
Longest leg = 2x + 4 = 20 + 4 = 24 feet
Hence the length of the longest leg is 24 feet.
Learn more about Pythagoras theorem here :
https://brainly.com/question/343682
#SPJ1
an inspector tested the first 125 radios that came off the production line today and found only 60% acceptable. After the inspector tested 25 more radios, the overall percentage of acceptable radios rose to 62%. The number of these 25 radios that were rejected is???
Answer: 7 radios
Step-by-step explanation:
The following can be deduced from the question:
Number of radios tested = 125 radios
Percentage acceptable = 60%
Numbers acceptable:
= 60% × 125
= 0.6 × 125
= 75 radios
Numbers rejected = 125 - 75 = 50 radio
We are further told that the inspector tested 25 more radios, this will be:
Number of radios tested
= 125 + 25 = 150 radios
Percentage acceptable = 62%
Numbers acceptable
= 62% × 150
= 0.62 × 150
= 93 radios
Numbers rejected= 150 - 93 = 57 radios
The number of these 25 radios that were rejected will be:
= 57 - 50
= 7 radios
About how many inches wide is the toolbox?
\(7.2 in. \: gum \: wrappers\)
\(12.49in. \: shoelaces \)
\(4.579in. \: paperclips\)
Answer FAST PLS!!!!!
Answer: 24
Step-by-step explanation:
7+12+5=24
Answer:
24
Step-by-step explanation:
100 Points! Algebra question. Graph the function. Photo attached. Thank you!
The cost of each pound of grass seed is $6.
A graph of the solution for the cost of each pound of grass seed is shown below.
How to determine the cost of each pound of grass seed?In order to determine the cost of each pound of grass seed, we would assign a variable to the cost of each pound of grass seed and then translate the word problem into an algebraic linear equation.
Let the variable x represent the cost of each pound of grass seed.
Since Lori bought 3.6 pounds of grass seed and she was charged $22.90, including a tax of $1.30, an algebraic linear equation that best represent this situation is given by;
3.6x + 1.30 = 22.90
3.6x = 22.90 - 1.30
3.6x = 21.60
x = 21.60/3.6
x = $6.
In conclusion, we would sue an online graphing calculator to plot the solution for the cost of each pound of grass seed as shown in the image attached below.
Read more on solution and equation here: brainly.com/question/25858757
#SPJ1
Problem
Circles \(K\) and \(L\) touch externally at point \(P\). Line \(ABC\) cuts \(K\) at points \(A\) and \(B\) and is tangent to \(L\) at \(C\). The line through \(A\) and \(P\) meets \(L\) at a second point \(D\).
Prove that \(PC\) bisects angle \(BPD\).
Step-by-step explanation:
Using the various theorems relating inscribed and external angles to intercepted arcs, we can write the following relations:
angle A = 1/2(arc BP) . . . . . . . . . . . inscribed angle
angle A = 1/2(arc CD -arc CP) . . . external angle at tangent/secant
angle CPD = 1/2(arc CD) . . . . . . . inscribed angle
angle CPB = 1/2(arc CP) + 1/2(arc BP) . . . . . sum of angles at the mutual tangent
ProofEquating the expressions for angle A, we have ...
1/2(arc BP) = 1/2(arc CD -arc CP)
Adding arc CP gives ...
1/2(arc BP +arc CP) = 1/2(arc CD)
Substituting the last two equations for angles from above, this gives ...
angle CPB = angle CPD
Hence PC bisects angle BPD.
Fill in the blank with a symbol that makes this statement true: 2/5 ____ 1/2
Help a brother out I haven’t slept in like 2 days
Answer:
pleae do my problem and ill help u
how many one and one fourths are in four and one half
Step-by-step explanation:
the frame of the tent is defined by a rectangular base and two parabolic arches that connect the opposite corners of the base. The graph of y=-0.18x^2+1.6x models the height can a child who is 4 feet tall walk under without bending over
The child who is 4 feet tall can walk under the tent without bending over, as the height of the tent at that point is greater than 4 feet.
1. Given equation: y = -0.1\(8x^2\) + 1.6x, where y represents the height of the tent and x represents the distance from the center of the tent.
2. We want to find the maximum height of the tent to determine if a 4-foot tall child can walk under it without bending over.
3. To find the maximum height, we need to determine the vertex of the parabolic equation.
4. The vertex of a parabola in the form y = a\(x^2\) + bx + c is given by the formula x = -b / (2a).
5. In our equation, a = -0.18 and b = 1.6. Plugging these values into the formula, we get x = -1.6 / (2 * -0.18).
6. Simplifying the expression, we find x = 4.44.
7. Now, substitute this value back into the equation to find the maximum height: y = -0.18 * (4.4\(4)^2\) + 1.6 * 4.44.
8. Evaluating the expression, we find y ≈ 4.32.
9. The maximum height of the tent is approximately 4.32 feet.
10. Since the child's height is 4 feet, the child can comfortably walk under the tent without bending over, as the height is greater than 4 feet.
11. Therefore, the child who is 4 feet tall can walk under the tent without bending over.
For more such questions on height, click on:
https://brainly.com/question/28990670
#SPJ8
93,83,65,59,88,76,86,93,48,73,54,79
What is the percentage of these test scores that are less than 88?
What is the least
common denominator
Answer:
9
Step-by-step explanation:
9 is the smallest number that 3 and 9 can both go into.
how much money deposited now will provide payment of Rs. 15000 at the end of each half year for 10 years, if interest is 16% compounded six-monthly
The interest is 16% compounded semi-annually, is Rs. 121,179.10.
To determine how much money needs to be deposited now to provide a payment of Rs. 15,000 at the end of each half year for 10 years, we will use the formula for the present value of an annuity.
Present value of an annuity = (Payment amount x (1 - (1 + r)^-n))/rWhere:r = interest rate per compounding periodn = number of compounding periodsPayment amount = Rs. 15,000n = 10 x 2 = 20 (since there are 2 half years in a year and the payments are made for 10 years)
So, we have:r = 16%/2 = 8% (since the interest is compounded semi-annually)Payment amount = Rs. 15,000Using the above formula, we can calculate the present value of the annuity as follows:
Present value of annuity = (15000 x (1 - (1 + 0.08)^-20))/0.08 = Rs. 121,179.10Therefore, the amount that needs to be deposited now to provide payment of Rs. 15,000 at the end of each half year for 10 years, if the interest is 16% compounded semi-annually, is Rs. 121,179.10.
For more such questions on semi-annually
https://brainly.com/question/30573341
#SPJ8
The coordinates of the points M, N, P, and Q are -11, 32, -15, and 17, respectively. Which point is closest to the origin?
M
P
N
Q
PLEASE HELP ME
Answer:
i think is M so -11
have a nice day! (^o^)
A rectangular tank 80 cm wide by 100 cm long by 60 cm high is filled up with water up to of its height. Water is then poured into the tank until it is 3 filled with 384 € of water. Find the amount of water that was poured the tank. Give your answer in litres.
Answer:
0 liters
Step-by-step explanation:
The first step in solving this problem is to find the volume of water that was originally in the tank when it was filled up to of its height. Since the tank is rectangular, we can use the formula for the volume of a rectangular prism:
Volume of tank = length x width x height = 100 cm x 80 cm x 30 cm = 240,000 cm³
Since the tank was filled up to of its height, the volume of water in the tank at this point is:
Volume of water in tank = 100 cm x 80 cm x 30 cm x 0.5 = 1,200,000 cm³
To find the amount of water that was poured into the tank to fill it up to 3 of its height, we need to subtract the volume of water that was originally in the tank from the total volume of water when it is 3 filled, which is 384 liters or 384,000 cm³ (since 1 liter = 1000 cm³):
Volume of water poured into tank = Volume of water when 3 filled - Volume of water in tank at of its height
= 384,000 cm³ - 1,200,000 cm³
= -816,000 cm³
Wait a minute, this result is negative, which means there was no water poured into the tank to reach the 3 filled level. In fact, it suggests that there was an excess of water that had to be removed from the tank to reach the desired level. This could be because the dimensions of the tank were not exact or because the tank was not level when filled to the first level.
Therefore, the answer to the problem is 0 liters or 0 cm³.
Note: It is important to always check the result of a calculation to ensure it makes sense in the context of the problem. In this case, the negative volume of water poured into the tank indicates that there may be an error in the problem statement or in the measurements provided.
please help khan academy
The inequality represented by the graph is given as follows:
y > 3x - 4.
How to define a linear function?The slope-intercept definition of a linear function is given as follows:
y = mx + b.
In which:
The slope m represents the rate of change.The intercept b represents the value of y when x = 0.The graph crosses the y-axis at y = -4, hence the intercept b is given as follows:
b = -4.
When x increases by 1, y increases by 3, hence the slope m is given as follows:
m = 3.
Hence the equation of the line is:
y = 3x - 4.
The inequality is composed by the values to the right (greater) of the line, and has an open interval due to the dashed line, hence:
y > 3x - 4.
More can be learned about linear functions at https://brainly.com/question/24808124
#SPJ1
Please take a look at the picture and answer it. :)
Answer:
Step-by-step explanation:
k (porportionality)=y/x
our point on the graph is (4,3) so our constant of porportionality is 3/4
List the terms of the polynomial. Give the coefficient of the second term. -4y5 + 6x4 +9w³ - 4w - 1 Separate terms using commas. Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c . Make sure your variables match those in the question. Terms Coefficient
The coefficient of the second term, 6x⁴, is 6.
The terms of the polynomial are:
-4y⁵, 6x⁴, 9w³, -4w, -1
The coefficient of the second term, which is 6x⁴, we look at the number in front of the variable term.
The coefficient is 6.
Therefore, the list of terms is:
-4y⁵, 6x⁴, 9w³, -4w, -1
Each term represents a separate component of the polynomial, where the variable is raised to a certain power and multiplied by its coefficient.
The coefficients indicate the scalar value by which each term is multiplied.
The polynomial's terms are -4y5, 6x4, 9w3, -4w, and -1.
Looking at the number in front of the variable term, we can determine the second term's coefficient, which is 6x4.
There is a 6 coefficient.
As a result, the terms are as follows: -4y5, 6x4, 9w3, -4w, and -1.
Each term represents a different part of the polynomial, where the variable is multiplied by its coefficient and raised to a given power.
The scalar value by which each phrase is multiplied is shown by the coefficients.
For similar questions on coefficient
https://brainly.com/question/1038771
#SPJ8
Grace is going to a carnival that has games and rides. Each game costs $1.50 and each ride costs $2.50. Grace spent $16.50 altogether at the carnival and the number of games she played is twice the number of rides she went on. Write a system of equations that could be used to determine the number of games Grace played and the number of rides Grace went on. Define the variables that you use to write the system.
Guys help me.
Answer:
g: games; r: rides
1.5g + 2.5r = 16.5
g = 2r
Step-by-step explanation:
g: # of games played
r: # of rides ridden
total amount spent: 1.50g + 2.50r = 16.50
relationship of games to rides: g = 2r
What is the "quotient" of two numbers?
Answer:
Result of a division
Step-by-step explanation:
Example
x / y = z
z is the quotient
Find the area of a rectangle whose length (L) = 15 in. and width (W) = 2 in.
(a) 17 in ²
(c) 13 in. ²
(b) 30 in.²
(d) 68 in.²
Which two discontinuities does the graph show?
<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3
Answer:
Discontinuities can be classified as jump, infinite, removable, endpoint, or mixed. Removable discontinuities are characterized by the fact that the limit exists. Removable discontinuities can be "fixed" by re-defining the function.
<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3
Answer:
jump discontinuity at x = –2; infinite discontinuity at x = 0
Step-by-step explanation:
For Edge 2021
1. Consider the relation represented by this set of ordered pairs: {(5,25), (6,30). (7,35). (8,40). (9.45)} a) Describe the relation in words. arrow diagram c) Identify the domain of the relation b) Represent the relation by an d) Does the relation represent a function? Explain.
The relation represented by the set of ordered pairs {(5,25), (6,30), (7,35), (8,40), (9,45)} can be described as follows: Each input value (x-coordinate) in the ordered pairs is mapped to an output value (y-coordinate) such that the output is obtained by multiplying the input by 5.
The domain of the relation is the set of all input values (x-values) in the ordered pairs. In this case, the domain is {5, 6, 7, 8, 9}.
The relation can be represented by an arrow diagram as follows:
```
5 --> 25
6 --> 30
7 --> 35
8 --> 40
9 --> 45
```
Yes, the relation represents a function. In a function, each input (x-value) must be mapped to exactly one output (y-value).
Thus, In this case, each input value in the ordered pairs is associated with only one output value, satisfying the definition of a function.
For more details regarding function, visit:
https://brainly.com/question/31062578
#SPJ1
Fact families for 4 3 and 12
Answer:
i have 5 sisters my dad and mom are still married and im the youngest
Trigonometric RatiosQuestion 10 of 10What is the approximate value of y in the diagram below? (Hint: You will needto use one of the trigonometric ratios given in the table.)
Given:
The adjacent side is 16.
The hypotenuse side is x.
The angle is 40 degrees.
To find:
The value of x.
Explanation:
Using the trigonometric ratio for the cosine formula,
\(\begin{gathered} \cos40^{\circ}=\frac{16}{x} \\ x=\frac{16}{\cos40^{\circ}} \\ x=20.89 \end{gathered}\)Thus, the value of x is 20.89.
Final answer:
The value of x is 20.89.
What happens at equilibrium price and quanity? 1.The quantity supplied equals the quantity demanded.
2.The price demanded equals the price supplied.
3.The priced demanded equals the quantity supplied.
4.The quantity supplied equals the price demanded.
Answer:
Step-by-step explanation:
At equilibrium price and quantity, the answer is 1. The quantity supplied equals the quantity demanded.
This means that the market is in a state of balance, where the quantity of a good or service that producers are willing to supply is exactly the same as the quantity that consumers are willing to buy. As a result, there is no excess supply or excess demand, and the price of the good or service is stable.
Select all of the linear transformations from ℝ3 to ℝ3 that are invertible. There may be more than one correct answer.A. Identity transformationB. Projection onto the xz-planeC. Reflection in the y-axisD. Rotation about the x-axisE. Dilation by a factor of 6F. Projection onto the z-axis
A linear transformation is a function from one vector space to another that preserves each vector space's underlying (linear) structure. A linear transformation can also be referred to as a linear operator or map.
The correct answers are A, D, and E.
A linear transformation from ℝ3 to ℝ3 is invertible if and only if it is bijective, meaning it is both one-to-one and onto.
The following linear transformations are invertible:
A. Identity transformation: The identity transformation maps every vector to itself and is one-to-one, so it is invertible.
D. Rotation about the x-axis: A rotation about the x-axis is a bijective linear transformation that maps each point in ℝ3 to another point in ℝ3 in a one-to-one manner, so it is invertible.
E. Dilation by a factor of 6: A dilation by a factor of 6 scales every vector by 6, and the scaling factor is nonzero, so this transformation is bijective and invertible.
For more questions on linear transformation
https://brainly.com/question/30461109
#SPJ4
The quantities xxx and yyy are proportional. xxx yyy 777 353535 121212 606060 202020 100100100 Find the constant of proportionality (r)(r)left parenthesis, r, right parenthesis in the equation y=rxy=rxy, equals, r, x.
Answer: The constant of proportionality is r = 5.
Step-by-step explanation:
O, we know that x and y are proportional, this means that:
y = r*x
where r is the constant of proportionality.
we also have the table
x y
7 35
12 60
20 100
Now, we can replace those values in our equation and get, for the first pair:
35 = r*7
r = 35/7 = 5
for the second pair:
60 = r*12
60/12 = 5 = r
So we can conclude that the constant of proportionality is 5.
Answer:
5
Step-by-step explanation:
It was right for me on khan
find the length of the arc. use 3.14 for the value of π. round to the nearest tenth
The length of the arc is 22.0 in.
Step - by - Step Explanation
What to find? Length of an arc.
Given Parameters:
• π=3.14
,• θ=210°
,• Radius(r) = 6
The length of an arc can be calculated using the formula below:
\(\text{Arc length=}\frac{\theta}{360}\times2\pi r\)Substitute the values into the formula and simplify.
\(\text{Arc length=}\frac{210}{360}\times2\times3.14\times6\)\(=\frac{7912.8}{360}\)\(=21.98\)Therefore, the length of the arc is approximately 22.0 in.
please answer, a question from ixl