How do i do this question help me please

6

2(x - 5)

0

Step-by-step explanation:

f(x) = x/2 + 5

a) f(2) = 2/2 + 5

= 6

b)

we will replace f(x) with y

y = x/2 + 5

now we replace x with y and y with x

x = y/2 + 5

x - 5 = y/2

2(x - 5) = y

now replace y with

so 2(x - 5)

c) = 2 (5 - 5)

= 0

answer:   expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%