8. A flea wants to jump from the bottom to the top of a staircase that has 10 steps. He can either jump 3 steps up or 4 steps down. What is the smallest number of jumps he must make?

8

Step-by-step explanation:

3 + 3 + 3 - 4 - 4 + 3 + 3 + 3

It takes a minimum of 8 jumps to land exactly on the 10th step.

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

i believe your answer is 99.7% of 7-year-old children are between 46.6 inches and 49.5 inches tall.