3 years ago

I need to know the answers

Mathematics

1 answer:

e-lub [12.9K]3 years ago

6 0

Is that your test or homework

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Brad sold candy bars and cookies for a fundraiser at school. Candy bars sold for $3, and cookies sold for $5. He sold a total of

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Answer: First option

12 candy bars were sold

Step-by-step explanation:

Call x the amount of candy sold and call z the amount of cookies sold. Then we know that

$x + z = 20$

We also know that candy bars sell for $ 3 and cookies sell for $ 5. The profit was $ 76

So:

$3x + 5z = 76$

To find the quantity of candy bars sold we must solve the system of equations:

$x + z = 20\\\\3x + 5z = 76$

Multiply the first equation by -5 and add it to the second equation

$-5x -5z = -100$

$3x + 5z = 76$

--------------------------------

$-2x = -24\\\\x = 12$

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13-9= 4

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Micheal was cutting firewood to use in his fireplace this winter. He cut each log into 14 pieces. If Micheal had 23 logs to cut,

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