Answer:
40 mph.
Step-by-step explanation:
Suppose grandma's house is 30 miles away (any distance would do but 30 is convenient).
Speed = distance / time
time = distance / speed
Time to get there = 30/60 = 1/2 hour.
Time to get back = 30/30 = 1 hour
Average speed = total distance/ total time
= (30 + 30) / ( 1 + 1/2)
= 60 / 1.5
= 40 miles per hour.
You cannot take the average of the speeds directly
(60+ 30)/2 = 45 is not correct as you cannot average ratios ( speed is a ratio).
c is the answer i hope this help
Answer:
35
Step-by-step explanation:
2(-5)^2+3(-5)
=2(25)+(-15)
=50-15
=35
PLS GIVE BRAINLIEST
7,159=s problem A
8,946-7,150=1,796 Problem B
This is reasonable because I did everything step by step Problem C
Problem 1. the answer is 4,307+1,614=5,921
Problem 2. the answer is 5,036-2,149=2,887
Step-by-step explanation:
hope this helps and hope you work it out with your mom
0.064 is 0.4 to the third power
