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Answer:
98.4 mph
Step-by-step explanation:
Bobby has 10 miles to go, speed 82 mph, so the time is 10/82 hours.
Rick has 12 miles to go and has to do it in 10/82 hr
Speed is 12/(10/82)
i.e 12÷10/82 = 12× 82/10
=984/10 = 98.4 mph
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Answer:
141
Step-by-step explanation:
So we substitute x with 6
5*6^2+2*6-10
5*36+12-10
180+2
182
then substitute x with 3
5*3^2+2*3-10
5*9+6-10
45-4
41
now we find the difference
182-41=141