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4 years ago

8

Need help with algerbra

1 answer:

TiliK225 [7]4 years ago

8 0

Y^2+5y the greatest common factor is y so

y(y+5)

...

4x^2-49 this is a "difference of perfect squares" which always factors to:

(a^2-b^2)=(a-b)(a+b), in this case:

(2x-7)(2x+7)

...

5s^2-20 GCF is 5

5(s^2-4) now the parenthetic term is a difference of squares so

5(s-2)(s+2)

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HELP me with These questions

Feliz [49]

Answer: 13.96 in²

<u>Step-by-step explanation:</u>

radius (r)

d = 2r

16 = 2r

8 = r

angle in radians (θ)

$\frac{180}{\pi} =\frac{25}{\theta}$

180(θ) = 25(π)

θ = $\frac{25}{180}\pi$

θ = $\frac{5}{36}\pi$

Area (A)

A = $\frac{1}{2}$ r² θ

= $\frac{1}{2}(8)^{2}(\frac{5}{36}\pi)$

= $\frac{40}{9}\pi$

= 13.96

*************************************************************************

Answer: 12π

<u>Step-by-step explanation:</u>

s = rθ

= 60 $(\frac{\pi }{5})$

= 12π

*************************************************************************

Answer: 22.440 cm²

<u>Step-by-step explanation:</u>

A = $\frac{1}{2}$ r²θ

= $\frac{1}{2}$ (10)² $(\frac{\pi} {7})$

= $\frac{50}{7}\pi$

= 22.440

*************************************************************************

Answer: 270°, 630°, -450°, -810°

<u>Step-by-step explanation:</u>

positive: -90 + 360 = 270

270 + 360 = 630

negative: -90 - 360 = -450

-450 - 360 = -810

*************************************************************************

Answer: $\frac{3\pi} {4}$

<u>Step-by-step explanation:</u>

$\frac{19\pi} {4} - 2\pi$

= $\frac{19\pi} {4} - \frac{8\pi} {4}$

= $\frac{11\pi} {4}$

$\frac{11\pi}{4} - 2\pi$

= $\frac{11\pi} {4} - \frac{8\pi} {4}$

= $\frac{3\pi} {4}$

If you subtract another 2π, you will end up with a negative value. The question asks for the smallest positive value.

5 0

4 years ago

A power company calculates a person's monthly bill from the number of kilowatt -hours ( kwh) , x, used . the function b(x)= dete

Ann [662]

Answer:

Information is missing on the price of electricity.

Step-by-step explanation:

There is information missing on the cost of the electricity, per kwh. b(x) = ????.

If it is $0.20/kwh, then we would have:

b(x) = $0.20x

b(800) = $0.20*(800)

b(800) = $160

It depends on the price.

6 0

2 years ago

HELP PLS<br><br><br>The function of F is defined by f(x)=x+2<br><br>find F(n-4)

GalinKa [24]

Answer:

Step-by-step explanation:

f(n - 4)= n - 4 + 2 = n - 2

7 0

2 years ago

Xy = 6<br> | 2x – y = 1<br> Solve each system by substitution

AnnZ [28]

Answer: {x,y} = {2,-4}

[1] x - y = 6

[2] 2x + y = 0

Step-by-step explanation:

7 0

4 years ago

What will be the total cost for 10 hours of work?

neonofarm [45]

Answer:

Datas are not given

................

6 0

3 years ago

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