Carl and Mike start a 3 mile race at the same time. If Mike ran the race at 6 miles per hour and finishes the race 7.5 minutes before Carl, how fast does Carl run?

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Step-by-step explanation:

Time = distance / speed = 3 miles / 6 miles per hour = 1/2 hour, or 30 minutes. Carl runs the race in 30 + 7.5 minutes = 37.5 minutes. Converting this to hours gives us 0.625 hours. Speed = distance / time = 3 miles / 0.625 hours = 4.8 miles per hour.

2x^2+5x+17

your welcome. : )

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step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

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⇒ ⇒

factorizing, we get that:

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then, the solutions are: or

nothing extraneous has been found!