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3 years ago

Solve by factoring x^2-8x-9 = 0

Mathematics

2 answers:

3241004551 [841]3 years ago

4 0

Answer:

the answer is ( x-9) (x+1) = 0

Step-by-step explanation:

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Round each number to the nearest million, thousand, and ten

yawa3891 [41]

Answer:

a. 4,000,000

b. 4,327,000

c. 4,326,800

a. 30,000,000

b. 29,727,000

c. 29,726,520

a. 3,000,000

b. 2,867,000

c. 2,867,000

Step-by-step explanation:

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2 years ago

44 ounces = ? Pounds Please answer I really do not understand

tatuchka [14]

44 ounces=2.75 pounds

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2 years ago

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Store A is advertising a sale that will reduce prices on all merchandise by 15%. Store B is advertising a sale that will reduce

dalvyx [7]

Store A = 15% Store B = 1/5 = 20% 20-15 = 5% Store B is reducing by 5% more, so c

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2 years ago

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Diona told me to get this app to solve my math problems,what is 10 + 10 Jean can't help because she's doing other stuff :,)

elena55 [62]

Answer:

Step-by-step explanation:

10 + 10

= 20

Just add units place first.

0 + 0 = 0

Then tens place.

1 + 1 = 2

So the number,

=> 20

5 0

2 years ago

I need help with these 2 problems I cant figure out.

Alla [95]

I started by labeling the right angle (Angle C) 90º. Next, I wrote down everything in one equation.

2x + 90 + 3x - 20 = 180º (180 degrees in a triangle)

Next, I add 20 on both sides.

2x + 90 + 3x = 200º

I combine like terms (2x and 3x)

5x + 90 = 200º

I subtract 90 from both sides.

5x = 110º

Divide 110 by 5 to get x.

x = 22

======

For problem two, I label all the angles I know.

49º + 80º + r = 180º

I add 80 and 49.

129º + r = 180º

I subtract 180 and 129 and get 51º, which is your angle for R.

For angle X, you know that angle R plus angle X equals half of a circle, which is 180º

We know from before that 129º is 180º without R, so X is 129º

I hope this helps! Let me know if I'm wrong!

5 0

2 years ago