I am not sure about the question but,I think this is the answer. The maximum people that she could safely take in her car to the fun run is 4.
First you simply have to substitute 2 in replace of all the a's, and -2 in replace of all of the b's
4((2)2+2(-2))
Then you want to follow the order of operations, PEMDAS (Parantheses-Exponent-Multiplication-Division-Addition-Subtraction), and multiply within the parantheses.
4(4+(-4))
Next you will add within the parantheses (So add the 4 and -4 together)
4(0)
Lastly multiply
0
Your answer is 0
Hope this helps!
276/5 is the answer after multiplying the two
Amount the coach will pay for the tennis balls
= 30/12 x 100
= $250
1.5x+x=1380
2.5x=1380
x=552 miles
A is the solution.