2 years ago

The length of the escalator is 36 ft and the

Mathematics

1 answer:

beks73 [17]2 years ago

8 0

Answer:

sin θ = 9 / 36 = 1/4

θ = 14.48 deg (ans C)

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Factor -7x3 + 21x2 + 3x - 9 by grouping. What is the resulting expression?

irga5000 [103]

Answer:

$(x-3)(-7x^2+3)$ is the resulting expression after grouping

Step-by-step explanation:

Given:

$-7x^3+21x^2+3x-9$

Now taking common $-7x^2$ from 1st 2 numbers and and 3 common from last we get

$-7x^2(x-3)+3(x-3)$

Now taking x-3 common from both numbers we get

$(x-3)(-7x^2+3)$ which is the final equation after grouping

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3 years ago

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Nookie1986 [14]

Step-by-step explanation:

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2 years ago

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jeka57 [31]

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3 years ago

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Use the slope formula to find the slope of the line passing through the given points.

n200080 [17]

Answer:

The slope is -3

Step-by-step explanation:

We can find the slope using

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3 0

3 years ago

Find the length of the segment with endpoints of (3,2) and (-3,-6).

MakcuM [25]

The formula of the length of the segment AB:
$A(x_A;\ y_A);\ B(x_B;\ y_B)\\\\|AB|=\sqrt{(x_B-x_A)^2+(y_B-y_A)^2}$
We have:
$A(3;\ 2)\to x_A=3;\ y_A=2\\\\B(-3;\ -6)\to x_B=-3;\ y_B=-6$
Substitute:
$|AB|=\sqrt{(-3-3)^2+(-6-2)^2}=\sqrt{(-6)^2+(-8)^2}\\\\=\sqrt{36+64}=\sqrt{100}=10$
Answer: B) 10.

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3 years ago