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3 years ago

NEED HELP ASAP! PLEASE SHOW WORK THANKS RANDOM ANSWERS WILL BE MODERATED!

Mathematics

1 answer:

Yuri [45]3 years ago

3 0

S = 2(LW +H(L +W))
= 2(2.2*3.0 +7.5(2.2 +3.0))
= 2(6.6 +7.5*5.2)
= 91.2 . . . . cm²

The appropriate choice is
4) 91.2

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3 years ago

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Read 2 more answers

Willing to brainlist solve 16-17 please during this exam

ivann1987 [24]

Answer:

16. B

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Step-by-step explanation:

16. The intercept form of the parabola is

$y=a(x-x_1)(x-x_2),$

where $x_1, x_2$ are two x-intercepts.

In your case,

$x_1=2\\ \\x_2=-8$

$y=a(x-2)(x-(-8))\\ \\y=a(x-2)(x+8)$

To find a, substitute coordinates of the point (-6,-4) parabola is passing through

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$-2p(y-k)=(x-h)^2,$

where (h,k) are the coordinates of the vertex and sign "-" because parabola goes down.

In your case, vertex is (2,3), so

$-2p(y-3)=(x-2)^2$

The vertex is 3 units from the focus, then

$\dfrac{p}{2}=3\\ \\p=6$

The equation of the parabola is

$-2\cdot 6(y-3)=(x-2)^2\\ \\y=-\dfrac{1}{12}(x-3)^2+3$

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4 years ago