A gym membership has an application fee of $5 plus $20 per month. Which function represents the cost of a gym membership, where x is the number of months? Question 15 options: A) f(x) = 5(20)x B) f(x) = 5x + 20 C) f(x) = 5x2 + 20 D) f(x) = 20x + 5

D) f(x) = 20x + 5

Step-by-step explanation:

A gym membership has an application fee of $5 plus $20 per month.

You pay a initial fee($5) and then a constant fee of $20 a month. That is, after x months you will have paid f(x) = 5 + 20x.

The correct answer is:

D) f(x) = 20x + 5

answer: 8d

step-by-step explanation:

45+5= 50+5=55+5=60

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.