Answer:
9) 25
10) 100
Explanation:
9)
if the total class is 5x, and the people who wear glasses is 2x,
that means that the people who do not wear glasses would be 3x
(because 5x - 2x = 3x)
the problem tells us that there are 15 people who do not wear glasses.
15 = 3x
15/3 = 3x/3
15/3 = x
5 = x
since x is 5, the total number of students is 25
because 5 * 5 = 25
10)
to start, divide 250 by 50.
250/50 = 5
250 is 5 times greater than 50.
since the ratio of dollar to game point is proportional,
you just need to multiply 5 by 20$ to get the answer
5 * 20 = 100$