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2 years ago

12

A repair bill for your car is $553. The parts cost $265. The labor cost is $48 per hour. Write and solve an equation to find the

number of hours of labor spent repairing the car.

1 answer:

rusak2 [61]2 years ago

8 0

(553-265)/48=6
6 hours spent repairing the car

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According to the secant-tangent theorem, we have the following expression:

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Then, we use the quadratic formula:

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$\begin{gathered} x_{1,2}=\frac{-6\pm\sqrt[]{6^2-4\cdot1\cdot(-315)}}{2\cdot1} \\ x_{1,2}=\frac{-6\pm\sqrt[]{36+1260}}{2}=\frac{-6\pm\sqrt[]{1296}}{2} \\ x_{1,2}=\frac{-6\pm36}{2} \\ x_1=\frac{-6+36}{2}=\frac{30}{2}=15 \\ x_2=\frac{-6-36}{2}=\frac{-42}{2}=-21 \end{gathered}$ <h2>Hence, the answer is 15 because lengths can't be negative.</h2>

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1 year ago

The function f(x) = { x + 1 is used to complete this Which statements are true of the given function? Check all that apply. tabl

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