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3 years ago

The axis of the symmetry for a function in the form f(x)=x^2+4x-5 is x=-2

Mathematics

1 answer:

Juliette [100K]3 years ago

6 0

Answer:

This is a true statement.

Step-by-step explanation:

In order to find the line of symmetry, use the symmetry formula.

-b/2a

The variable a would be the coefficient of x^2 and b would be the coefficient of x.

-(4)/2(1)

-4/2

-2

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Person A can paint the neighbor's house 5 times as fast as Person B. The year A and B worked together, it

LenKa [72]

Answer:

Person A paints the house in 12 days.

person B paints the house in 60 days.

Step-by-step explanation:

The together rate is the sum of each separate rate.

Person A can paint the neighbor's house 5 times as fast as Person B.

This means that the rate of person A is 1/x, and the rate of person B is 1/5x.

The year A and B worked together, it took them 10 days.

This means that:

$\frac{1}{x} + \frac{1}{5x} = \frac{1}{10}$

Multiplying everything by 10x

$10 + 2 = x$

$x = 12$

This means that:

Person A paints the house in 12 days.

person B paints the house in 60 days.

8 0

3 years ago

J+2 = 3k+5 in terms of k

leonid [27]

Answer:

(j-3)/3 =k

Step-by-step explanation:

j+2 = 3k+5

Solve for k

Subtract 5 from each side

j+2-5 = 3k+5-5

j-3 = 3k

Divide each side by 3

(j-3)/3 = 3k/3

(j-3)/3 =k

5 0

3 years ago

Is 87 composite or prime

ankoles [38]

87 is a composite number

5 0

4 years ago

Read 2 more answers

Custumers of a phone company can choose between two service plans for long distance calls. The first plan has a $9 monthly fee a

saul85 [17]

The answer is 350.

m= minutes

Plan 1: 9+0.13m
Plan 2: 23+0.09m

9+0.13m = 23+0.09m
-9 -9
0.13m = 14+0.09m
-0.09m -0.09m
0.04m= 14
14÷0.04= 350
m= 350

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3 years ago

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How to find the volume of a pyramid

lbvjy [14]

$V=\dfrac{1}{3}BH\\\\B=9\cdot6=54\ (in^2)\\H=7\ in\\\\subtitute\\\\V=\dfrac{1}{3}\cdot54\cdot7=18\cdot7=126\ (in^3)$

Answer: a. 126 in³.

6 0

3 years ago