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. Patty found a battery-powered toy car in her basement that moved at a speed of 23 mm per second. After she replaced the battery, the speed of the car increased by x mm per second. The car with the new battery can travel 50 mm in 2 seconds. Which equation would you solve to find x?A. 2(23+ x)=50B. 2(23)+ x=50C. 23x + 2=50D. 23(x+2)=50

User MrEmpty
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1 Answer

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Since the car with the new battery can travel 50 mm in 2 seconds, we can divide the distance by the time to find the new speed:


(50)/(2)=25

So the new speed is 25 mm per second.

Since the old speed is 23 mm per second and it was added to x, we have the equation:


\begin{gathered} 23+x=25 \\ x=25-23 \\ x=2 \end{gathered}

So the value of x is 2.

The equation 23 + x = 25 can be rewritten as:


\begin{gathered} 23+x=(50)/(2) \\ 2(23+x)=50 \end{gathered}

So the correct option is A.

User Andrewdotn
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