12a+(−7)+12a=13 what is the value of a

1 answer:

6 0

Rememeber thath you can do anything to an eqation as long as you do it to both sides

12a-7+12a=13
add like terms
24a-7=13
add 7 to both sides
24a=20
divide both sides by 24
a=20/24
a=5/6

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Consider the diagram of the problem.

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Another point of this parabola is (200, 100), as can be checked from the figure.

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$y=a(x-h)^{2}+k$ , where (h, k) is the vertex of the parabola,

replacing (h, k) with (0, 40), we have:

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