Question

I’m struggling please help thank you always

Answer 1

A) -3

B) 7

C) -13

D) 5x+2

Explanation:

For A, B, and C substitute the value stated in the parenthesis.

A) f(0) means to find the value when x=0, so we substitute 0 where x is in the function.

`5(0)-3`

Then use PEMDAS and multiply first and then subtract 3 from the product.

`5(0)=0\\0-3=-3`

B) Take the same steps as before with a different value. Substitute 2 for x.

`5(2)-3\\5(2)=10\\10-3=7`

C) Also the same thing as the previous problems. Substitute -2 for the value of x.

`5(-2)-3\\5(-2)=-10\\-10-3=-3`

D) Similar to above substitute x+1 where x is.

`5(x+1)-3\\`

Then distribute 5(x+1) to get

`5x+1(5)\\5x+5`

Then simplify the equation

`5x+5-3=5x+2`

Answer 2

- 3 , 7 , - 13 , 5x + 2

Explanation:

A

to evaluate f(0) substitute x = 0 into f(x)

f(0) = 5(0) - 3 = 0 - 3 = - 3

B

substitute x = 2 into f(x)

f(2) = 5(2) - 3 = 10 - 3 = 7

C

substitute x = - 2 into f(x)

f(- 2) = 5(- 2) - 3 = - 10 - 3 = - 13

D

substitute x = x + 1 into f(x)

f(x + 1)

= 5(x + 1) - 3 ← distribute each term in the parenthesis by 5

= 5x + 5 - 3 ← collect like terms

= 5x + 2