Answer:
9 mph
Step-by-step explanation:
-Let x be the speed of the boat upstream.
-Since the time upstream and downstream is equal, we will equate their time functions to solve for x:
-Speed upstream=x-8
-Speed downstream=x+8
#We then equate as follows:
Hence, the speed of the boat in still water is 9 mph
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Answer:
D. 100°
Step-by-step explanation:
A straight line is 180°. Add 50° and 30° (which is 80°) and subtract the total from 180°.
50 + 30 = 80
180 - 80 = 100
The correct answer would be A less than 1/2 inche
Answer:
Part 1. 10 modules per floor
Part 2. Two different rectangular prism
Step-by-step explanation:
Let
x ----> the number of modules
y ---> the number of stories
we have
x=150\ modules\\y=15\ stories
Divide the number of modules by the number of stories
so
\frac{x}{y}=\frac{150}{15}=10\ \frac{modules}{floor}