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2 years ago

-3|x|=9, what is x? I wrote that x = -3, but I guess that's wrong?

Mathematics

1 answer:

miv72 [106K]2 years ago

3 0

Answer:

It is correct

Step-by-step explanation:

It is correct since the product of 2 negatives is always a positive:

Also since it is the same number being multiplied the answer is a square number:

that is why the square root of anything is known as ±.

Since there are 2 solutions, this also explains why there are 2 solutions in a quadratic equation.

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We have been given that Lydia uses 15 grams of protein powder to make a 22-ounce shake. She decides to make shakes for the week and plans to make 198 ounces. We are asked to find the grams of protein powder Lydia will use.

We will use proportions to solve our given problem.

$\frac{\text{Amount of protein powder}}{\text{Amount of shake}}=\frac{15\text{grams}}{22\text{ ounces}}$

$\frac{\text{Amount of protein powder}}{\text{198 ounces}}=\frac{15\text{grams}}{22\text{ ounces}}$

$\frac{\text{Amount of protein powder}}{\text{198 ounces}}\times \text{198 ounces}=\frac{15\text{grams}}{22\text{ ounces}}\times \text{198 ounces}$

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Therefore, Lydia will use 135 grams of protein powder for the entire week.

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sveticcg [70]

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Answer:

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