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3 years ago

MATH HELP?!

Mathematics

1 answer:

Scrat [10]3 years ago

6 0

10x2 +7x -12=15
-7x. -7
x=8

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3 years ago

A mistake was made in mixing the lemonade—<br> PLEASE HELP!!

beks73 [17]

Answer:

Part A:

$4 + x = y$

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$x = 8/3\ quarts\ of\ 100\%\ solution$

$y = 20/3\ quarts\ of\ 70\%\ solution$

Part B:

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Step-by-step explanation:

Part A:

The inicial concentration of the lemonade is 50%, and the volume is 4 quarts, and we will add x quarts of a lemonade with a concentration of 100%, so the total volume will be y, and the concentration will be 0.7, so we have that:

$4 + x = y$

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Using the value of y from the first equation in the second one, we have:

$2 + x = 0.7*(4 + x)$