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2 years ago

Simplify (-7x+5)-(2x^2-8x+6) in standard form

Mathematics

1 answer:

Zarrin [17]2 years ago

8 0

Answer: -2x² - 15x + 11

Step-by-step explanation:

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If s(x) = 2-x² and t(x) = 3x, which value is equivalent to (sot)(-7)?

Sedaia [141]

Answer:

-14+63x²

Step-by-step explanation:

(sot)=s(tx)

=s(3x)

=2-(3x)²

=2-9x²

(sot)(-7)=-7(2-9x²)

=-14+63x²

I hope I helped

and of I am correct mark my answer as brainliest

8 0

2 years ago

Verify the identity. cot(x - pi/2) = -tan(x)

gizmo_the_mogwai [7]

Answer:

See below.

Step-by-step explanation:

$\cot(x-\frac{\pi}{2})=-\tan(x)$

Convert the cotangent to cosine over sine:

$\frac{\cos(x-\frac{\pi}{2} )}{\sin(x-\frac{\pi}{2})} =-\tan(x)$

Use the cofunction identities. The cofunction identities are:

$\sin(x)=\cos(\frac{\pi}{2}-x)\\\cos(x)=\sin(\frac{\pi}{2}-x)$

To convert this, factor out a negative one from the cosine and sine.

$\frac{\cos(-(\frac{\pi}{2}-x ))}{\sin(-(\frac{\pi}{2}-x))} =-\tan(x)$

Recall that since cosine is an even function, we can remove the negative. Since sine is an odd function, we can move the negative outside:

$\frac{\cos((\frac{\pi}{2}-x ))}{-\sin((\frac{\pi}{2}-x))} =-\tan(x)\\-\frac{\sin(x)}{\cos(x)} =-\tan(x)\\-\tan(x)\stackrel{\checkmark}{=}-\tan(x)$

8 0

3 years ago

If you had $20 US, estimate how many Yen and Pounds you would have. Show your work.<br> please help

AlladinOne [14]

I’m not trying to scam you I’ll do the work but can you give more details

5 0

3 years ago

Read 2 more answers

Yesny had $240 to spend on five pairs of jeans. How much did each pair of

krek1111 [17]

Answer:

5x + 10 = 240

Step-by-step explanation:

3 0

4 years ago

Read 2 more answers

Help please and thank you

aksik [14]

Remember
$(a^b)^c=a^{bc}$
and
$\frac{x^a}{x^b}=x^{a-b}$

so

$\frac{(7^2)^5}{7^{-6}}=$
$\frac{7^{2*5}}{7^{-6}}=$
$\frac{7^{10}}{7^{-6}}=$
$7^{10-(-6)}=$
$7^{10+6}=$
$7^{16}$

the answer is D

5 0

4 years ago