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3 years ago

Someone please help me.

Mathematics

1 answer:

Alexandra [31]3 years ago

5 0

Answer:

y=mx +b

slope intercept form...

B = y-intercept...

b=9/10

y-intercept = 9/10

Step-by-step explanation:

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Help angels this geometry is a pain in the 4$$

stich3 [128]

Answer:

1. 4.5

2. The scale factor is 3/4

Step-by-step explanation:

6 0

2 years ago

What is the product? –9x(5 – 2x) 18x2 – 45x –18x2 – 45x –18x – 45x 18x – 45x

ser-zykov [4K]

–9x(5 – 2x)
= -45x + 18x^2
= 18x^2 - 45x

answer
18x^2 - 45x

7 0

3 years ago

Read 2 more answers

HELP ME PLEASE ILL GIVE BRAINLIEST

Alex73 [517]

Answer:

la respuesta correcta es la c

step explanation:

la respuesta correcta es la c

7 0

3 years ago

Rewrite with only sin x and cos x.

Annette [7]

Option A

$\cos 3 x=\cos x-4 \cos x \sin ^{2} x$

Solution:

Given that we have to rewrite with only sin x and cos x

Given is cos 3x

$cos 3x = cos(x + 2x)$

We know that,

$\cos (a+b)=\cos a \cos b-\sin a \sin b$

Therefore,

$\cos (x+2 x)=\cos x \cos 2 x-\sin x \sin 2 x$ ---- eqn 1

We know that,

$\sin 2 x=2 \sin x \cos x$

$\cos 2 x=\cos ^{2} x-\sin ^{2} x$

Substituting these values in eqn 1

$\cos (x+2 x)=\cos x\left(\cos ^{2} x-\sin ^{2} x\right)-\sin x(2 \sin x \cos x)$ -------- eqn 2

We know that,

$\cos ^{2} x-\sin ^{2} x=1-2 \sin ^{2} x$

Applying this in above eqn 2, we get

$\cos (x+2 x)=\cos x\left(1-2 \sin ^{2} x\right)-\sin x(2 \sin x \cos x)$

$\begin{aligned}&\cos (x+2 x)=\cos x-2 \sin ^{2} x \cos x-2 \sin ^{2} x \cos x\\\\&\cos (x+2 x)=\cos x-4 \sin ^{2} x \cos x\end{aligned}$

$\cos (x+2 x)=\cos x-4 \cos x \sin ^{2} x$

Therefore,

$\cos 3 x=\cos x-4 \cos x \sin ^{2} x$

Option A is correct

7 0

3 years ago

When x = -2 h (x) = |-2x-6|

stich3 [128]

Answer:

Step-by-step explanation:

A function is an equation that has only one answer for y for every x. A function assigns exactly one output to each input of a specified type. It is common to name a function either f(x) or g(x) instead of y. f(2) means that we should find the value of our function when x equals 2.

so you must first find what is the x and which one is the y in the function then you will find the answer when you solve the problem

4 0

3 years ago