Question

Kristina joined a health club. She paid an annual membership fee of $40 and $3.50 each time she worked out.

Part A
Write an equation to show the total amount, t, Kristina paid to go the health club z times.

Part B
Kristina spent a total of $110.00 before she stopped going to the health. How many times did she go to the health club?

Answer 1

Part A) The equation is
`t=3.50z+40`

Part B) Kristina did go to the gym 20 times

Explanation:

Let

t-----> the total amount

z----> the number of times that Kristina go the health club

Part A) Write an equation

we know that

The linear equation that represent this situation is

`t=3.50z+40`

Part B) For
`t=\$110.00`

Substitute the value of t in the linear equation and solve for z

`110.00=3.50z+40`

`3.50z=110.00-40`

`3.50z=70.00`

`z=70.00/3.50`

`z=20\ times`