Timothy is going to the store to buy balloons. Large balloons cost $7.80 each and small balloons cost $2.25 each. He has $75 to spend. Which inequality shows all possible combinations of large balloons, x, and small balloons, y, that Timothy can purchase?

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

add the numbers under frequency to find the total number:

5 + 8 +7 + 4 + 0 +1 = 25

the answer is 25.

the correct answers are 1, 2, 4, and 5! i just got it right!