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1 vote
For how many integers x is the equation 22x+1 = 3x - 3 true?

User Zhuoying
by
8.3k points

1 Answer

6 votes

REmember that

the speed is equal to divide the distance by the time

so

speed=d/t

in this problem we have

speed=3.6x10^4 miles/hour

d=7.2x10^8 miles

substitute in the formula


3.6\cdot10^4=(7.2\cdot10^8)/(t)

solve for t


\begin{gathered} 3.6\cdot10^4=(7.2\cdot10^8)/(t) \\ t=(7.2\cdot10^8)/(3.6\cdot10^4) \\ t=2.0\cdot10^4\text{ hours} \end{gathered}

therefore

answer is option D

User Nafees Anwar
by
8.0k points

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