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3 years ago

Solve for x solve for x

Mathematics

2 answers:

soldi70 [24.7K]3 years ago

5 0

Answer:

x=5

Step-by-step explanation:

since two sides are congruent, the two unknown angles are congruent.

All triangle angles total 180 degrees.

so:

180-88=92

92/2=46

9x+1=46

9x=45

x=5

muminat3 years ago

5 0

Answer:

The answer is x=5

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3 years ago

Which of the following are solutions to 2x2 – 8x - 90? Select all that apply.

Bond [772]

Answer:

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Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$2x^{2} -8x-90$

equate to zero

$2x^{2} -8x-90=0$

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substitute in the formula

$x=\frac{-(-8)\pm\sqrt{-8^{2}-4(2)(-90)}} {2(2)}$

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$x=\frac{8-28} {4}=-5$

therefore

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3 years ago