Answer:

Step-by-step explanation:
Given

Required
Simplify

Open brackets

Collect Like Terms

Simplify like terms

Answer:

Step-by-step explanation:
velocity of river with respect to ground = 4 mi/h south

Velocity of swimmer with respect to river = 2 mi/h east

According to the formula of relative velocity


Where, V(S,G) be the velocity of swimmer with respect to ground, it is true velocity of swimmer.

I subtracted 30 from 12 and i got 18 for my final answer <span />
Step-by-step explanation:
When w=10, 7w=7×10=70
But the given value of 7w is 73.
So, the given value is not a solution of the equation.
<span> When raising an number to zero power you will always get 1. you raise both the numerator and the denominator</span>