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2 years ago

Which expression is equal to (x+2) (-x^2+2x-6)

Mathematics

1 answer:

lyudmila [28]2 years ago

6 0

Answer:

$\huge\boxed{C.\ -x^3-2x-12}$

Step-by-step explanation:

$(x+2)(-x^2+2x-6)\\\\=(x)(-x^2)+(x)(2x)+(x)(-6)+(2)(-x^2)+(2)(2x)+(2)(-6)\\\\=-x^3+2x^2-6x-2x^2+4x-12\\\\\text{combine like terms}\\\\=-x^3+(2x^2-2x^2)+(-6x+4x)-12\\\\=-x^3-2x-12$

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PLEASE ANSWER FULL QUESTION

Komok [63]

Answer:

I don't know the answer !!! :(

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2 years ago

A palm tree is supported by two guy wires as shown in the diagram below. Which trig expression can be used to find the height on

Volgvan

Answer:

D. $tan(30^\circ+45^\circ)$ is the correct answer.

Step-by-step explanation:

The given situation can be represented as a figure attached in answer area.

B is the base of tree.

C is the base of wires.

A and D are the end of 2 wires supporting the tree.

$\angle DCB =45^\circ\\\angle ACB =75^\circ\\$

Here, we need to find the Height of the tree which is represented the by side AB.

and we are given that bases of wires and tree base are at a distance 4 ft.

i.e. side BC = 4 ft

If we look at the $\triangle ABC$ , we are given the base BC and the $\angle ACB$ , and the perpendicular is to be find out.

We can use trigonometric identity:

$tan\theta =\dfrac{Perpendicular}{Base}$

$tan 75^\circ = \dfrac{AB}{BC}\\\bold {tan (45+30)^\circ }= \dfrac{AB}{4}\\\Rightarrow AB = \bold {tan (45+30)^\circ } \times 4 = 14.93\ ft$

Hence, D. $tan(30^\circ+45^\circ)$ is the correct answer.

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2 years ago

What point of concurrency in a right triangle is also the midpoint of the hypotenuse?

tekilochka [14]

The correct answer is d, i got it right

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Solve for n <br> n + 6 = 12

zepelin [54]

Answer:

n=6

Step-by-step explanation:

12-6=6

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For a dinner party, a catering company charges a set fee $150 plus $20 per person. How much will it cost for 35 people to attend

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Answer:

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