$\bf \textit{area of a triangle}\\\\ A=\cfrac{1}{2}bh~~ \begin{cases} b=base\\ h=height\\[-0.5em] \hrulefill\\ b=\stackrel{doubled}{2b} \end{cases}\implies A=\cfrac{1}{2}(2b)(h)\implies \stackrel{\textit{twice as the original area}}{A=bh} \\\\[-0.35em] ~\dotfill$

$\bf \textit{area of a triangle}\\\\ A=\cfrac{1}{2}bh~~ \begin{cases} b=base\\ h=height\\[-0.5em] \hrulefill\\ h=\stackrel{halved}{\frac{h}{2}} \end{cases}\implies A=\cfrac{1}{2}b\left( \cfrac{h}{2} \right)\implies \stackrel{\textit{half of the original area}}{A=\cfrac{1}{2}bh\left( \cfrac{1}{2} \right)}$

7 0

4 years ago

An auto repair shop charged a customer $349 to repair a car. The bill listed $99 for parts and the remainder for labor. If the c

bekas [8.4K]

Answer:

It took 5 hours to repair the car

Step-by-step explanation:

An auto repair shop charged a customer $349 to repair a car.

The bill listed $99 for parts and the remainder for labor.

The cost of labor is $50 per hour. If the number of hours it took to repair the car is x, then:

99 + 50x = 349

To find the number of hours it took to repair the car, we need to find x:

50x = 349 - 99

50x = 250

x = 250 / 50 = 5 hours

It took 5 hours to repair the car.

4 0

4 years ago