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math help please?
Explain and solve.
There is a pair of whole #'s a and b, each greater than 1 and less than 10, for which a to the b power = b to the a power plus 1. find the value of (a+b)squared.
a 9
b 25
c 36
d 49
A man travels a distance of 20 miles at 60 miles per hour and then returns over the same route at 40 miles per hour. Find the average rate for the round trip in miles per hour,
a 50
b 48
c 47
d 46
1 Answer
- Nelson_DeVonLv 71 decade agoFavorite Answer
Answer b and b
3^2=9 2^3=8, (3+2)^2=25
It takes 20 minutes to go 20 miles at 60mph. It takes 30 minutes to go 20 miles at 40mph. So the man went 40 miles in 50 minutes or 48mph.
