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2 years ago

20 Points if you answer this question

Mathematics

1 answer:

Setler [38]2 years ago

6 0

2x² + 5x - 18
the answers is D)

brainliest?

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2 years ago

A pharmacist has a 12% solution and a 20% solution of boric acid. How much of each should she use to make 80 grams of a 15% solu

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Step-by-step explanation:

If x = the amount of 12% and y = the amount of 20%, then x + y = 80

Since we need 80 grams of 15%, 80(.15) = 12.

We are given that .12x + .20y = 12.

We can solve the first equation for x or y. Let's do x.

x = 80 - y

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