Answer:
B
Step-by-step explanation:
190mph
I used speed calculator with advanced mode
HTTP://www.omnicalculator.com/everyday-life/speed
<h3>
2 Answers: B and D</h3>
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Explanation:
Choice B is one answer because -2 and 2 are additive inverses that add to -2+2 = 0
Choice D is a similar story. We have -5+5 = 0
In general, if x is some number then -x is its additive inverse. So we can say x+(-x) = 0 or -x+x = 0. In short, additive inverses add to 0.
If it took 4 miles per hour you multiply that twice cuss its traveling back then forth so you repeat the same process 30 miles times 2 which is 60 hope this helps.