Answer:
or 
Step-by-step explanation:
4x + 15 < 40
Subtract 15 from both sides
4x + 15 - 15 < 40 - 15
4x < 25
Divide both sides by 4
4x/4 < 25/4
x < 6.25
or
x < 6 1/4
Answer:
729
Step-by-step explanation:
1/3^-2×3^-4×(-1)^2
=3^2×3^4/1
=9×81
=729
Answer:
30<x+8 and 22<x
Step-by-step explanation:
subtract 8 from 30 to get 22
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The one who walked 1.2 miles would have made $72 and the one who walked 0.8 miles would have made $48.
