Javier earns $7.50 per hour and works 20 hours per week. He wants to know how many weeks, w, he will need to work to save
$1,200.00 for school. Using the equation below, how many weeks will he need to work to save up $1,200.00?

8 Weeks

Step-by-step explanation:

Earning per hour = $7.50

and Javier works 20 hours per week

Therefore, in one week, Javier will earn $7.50 X 20 = $150

To save $1,200.00 for school, Javier will need to work;

1200.00 / amount earned per week

This will give;

1200.00 / 150

= 8 weeks

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional