Answer:
C
Step-by-step explanation:
12x + 20 = 4(3x + 5)
gcf = 4
Since the ratio is 2:10 the total must be a multiple of twelve, and in this case is 12. So each part is 1/12 of the total or one.
So Gabriel needs to mix 2kg of compost with 10kg of potting soil.
Answer:
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Step-by-step explanation:
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Answer:
x = 3 and 7
There are two true solutions.
Step-by-step explanation:
To solve
, use inverse operations by squaring both sides of the equal sign.

The quadratic expression can be factored into binomials and set equal to 0 by the zero product property to find x.
(x - 3) ( x - 7) = 0
x-3 = 0 so x=3
x-7 = 0 so x=7
Now check each solution into the original equation to be sure it solve the solution and is not extraneous.

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