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3 years ago

PLEASE I MARK U THE BRAINIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

omeli [17]3 years ago

5 0

Answer:

20 degrees

I know that it is acute, meaning it is less than 90. It is also less than 45 degrees, and is in the middle of 45 to 0 degree interval, so I say it is 20 degrees.

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Solve for x. Write both solutions, separated by a comma. 8x^2+7x-1=0

Ivan

Answer:

Step-by-step explanation:

8x² + 7x - 1 = 0

Rewrite 7x as a difference

That's

8x² + 8x - x - 1 = 0

Factorize

8x( x + 1) - ( x + 1) = 0

(8x - 1)( x + 1) = 0

8x - 1 = 0 x + 1 =0

8x = 1 x = - 1

x = 1/8

The solutions are

Hope this helps you

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Please help out

TEA [102]

$a_1=-5;\ a_2=20;\ a_3=-80\\\\a_n=a_1r^{n-1}\\\\r=a_2:a_1\to r=20:(-5)=-4\\\\Answer:\boxed{a_n=-5\cdot(-4)^{n-1}}\to\fbox{B.}$

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3 years ago

Find the values of x and y in the diagram.

lilavasa [31]

Step-by-step explanation:

the triangle URT is an Equilateral triangle so all angles are equal to 60°

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$\sin(30) = \frac{x - 7}{11 + x - 7 } \\ \sin(30) = \frac{x - 7}{x + 4} \\ 0.5 = \frac{x - 7}{x + 4} \\ 0.5(x + 4) = (x - 7) \\ 0.5x + 2 = x - 7 \\ 0.5x = 9 \\ x = 18$

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3 years ago