ANSWER:
D. - 1 / 2
This is as 104 ÷ - 52 = - 1 / 2
As well as this, - 52 ÷ 26 = - 1 / 2
And this ratio applies for the other numbers in the sequence as well.
Therefore, the answer must be - 1 / 2.
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7x - 1 = 5x - 8
Minus 5x on each side
2x -1 = -8
Plus 1 on each side
2x = -7
Divide by 2 on each side
x = -7/2
The number is most likely -7/2
Answer:
(-1, 6)
Step-by-step explanation:
A graphing calculator shows the vertex to be (x, y) = (-1, 6).
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You can also find it by putting the equation into vertex form.
y = -2(x^2 +2x) +4
y = -2(x^2 +2x +1) +4 +2(1) . . . . . add 1 inside parens; the opposite outside
y = -2(x +1)^2 +6
Compare to ...
y = a(x -h)^2 +k
and you see a=-2, h=-1, k=6
The vertex is (h, k) = (-1, 6).
You take (8x - 6) then add 80 =90 then solve for x
8x-6+80 =90
x= 2