Answer:
see below PLEASE GIVE BRAINLIEST
Step-by-step explanation:
Rate on still sidewalk : 49 ÷ 7 = 7 ft per second
Rate of moving sidewalk : 77 ÷ 7 = 11 ft per second
4.5/3 = x/5
then:
x = 5 * 4.5 / 3 = 15/2 = 7.5
hope that helps
Answer:

Step-by-step explanation:
The answer is 9! 15-12=3 and 3x18 is 54 and 54/6 is 9.
Answer:
y ⋅ (−3 − 7.8 ⋅ x)
Step-by-step explanation: