3 years ago

Look at this please i dont need help im just trying to tell everybody something

Mathematics

1 answer:

ch4aika [34]3 years ago

8 0

Answeri did it

3Step-by-step explanation:

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How to factor this expression: x^2-9?

Lena [83]

Answer:

(x+3)(x-3)

Step-by-step explanation:

rewrite "9" as 3^2

so it is x^2-3^2

You use the difference of squares: a^2-b^2=(a+b)(a-b)

apply it: (x+3)(x-3)

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2 years ago

Eight equals r to the power of two

Tasya [4]

Answer:

r= $2\sqrt{2}$

r= - $2\sqrt{2}$

Step-by-step explanation:

8= $r^{2}$

Square root both sides of the equation.

r= $2\sqrt{2}$

r= - $2\sqrt{2}$

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2 years ago

A side of the triangle below has been extended to form an exterior angle of 129 find the value of X

yawa3891 [41]

Basically the line is 180° in total.
If one side is 129°
then the other side is 180 - 129
which means x = 51°

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3 years ago

Rectangle JKLM is rotated 90° clockwise about the origin. On a coordinate plane, rectangle J K L M has points (negative 4, 1), (

Alexus [3.1K]

Answer:

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Step-by-step explanation:

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3 years ago

Calculate- (with work pleasee) i really need it !!<br> -0.2(x-20)=44-x

erica [24]

Answer:

x=50

Step-by-step explanation:

-0.2(x-20)=44-x

Distribute

-0.2x+4=44-x

Add x to each side

-.2x +4+x = 44-x+x

.8x+4 = 44

Subtract 4 from each side

.8x+4-4 = 44-4

.8x = 40

Divide each side by .8

.8x/.8 = 40/.8

x=50

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2 years ago