Answer:

Step-by-step explanation:
We have the two functions:

And we want to find:

This is equivalent to:

Therefore, we will have:

By substitution:

Simplify. Square and distribute:

Rearrange:

Combine like terms:

7 minus f in algebraic expression= 7-f is the answer
QUESTION:
Four more than a number is greater than or equal to 17.
ANSWER:
Let the number be x, so inequality becomes
x + 4 ≤ 17.
Melissa's family can afford <u>6</u><u> </u><u><em>days of vacation</em></u><u>.</u>
Reason:
You need to divide the budget by the money they spend everyday.
$750 ÷ $125 = <u>6 </u><u><em>days that the family can afford to pay for vacation.</em></u>
Hope this helps you!