Pls help quick will mark brainliest

see explanation

Step-by-step explanation:

(a)

Given

f(x) = 2x + 1

To find f(2) substitute x = 2 into f(x)

f(2) = 2(2) + 1 = 4 + 1 = 5

(b)

let y = f(x) and rearrange making x the subject, that is

y = 2x + 1 ( subtract 1 from both sides )

y - 1 = 2x ( divide both sides by 2 )

= x

Change y back into terms of x with x = (x)

(x) =

(c)

Substitute x = 7 into (x) , that is

(7) = = = 3

518,400

step-by-step explanation:

the area is multiplying all the given measurements together.

40 * 18 * 30 * 24 = 518,400

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40