Josh mows grass to earn extra money. he charges $25.00 for each lawn. he mows at least 5 yards each week; but not more than 20 yards. the function f(x) = 25x models his income. write the domain of the function as an inequality.

Let

x = number of yards mowed

The domain of the function is

 5 ≤  x  ≤ 20

If we multiply the inequality by 25, we get

125  ≤  25*x  ≤ 500

Which is the same as

125  ≤  f(x)  ≤ 500

(Range of the function)

Domain   5 ≤  x  ≤ 20

Range     125  ≤  f(x)  ≤ 500

the 4th choice is the correct one

step-by-step explanation:

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a