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Oxana [17]
2 years ago
9

Does anyone know the answer to this question???

Mathematics
1 answer:
xxMikexx [17]2 years ago
7 0

Answer:

You can solve this by having 2 different equations and setting both of them to 180 because they are supplemetnary anhles

Step-by-step explanation:

so for abc the equation= 180, then solve

then for the other angle cbd=180, then solve

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Solve -7x^2+x+9=-6x quadratic formula
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Answer:

-7x^2+x+9=-6x

-7x^2+x+9+6x=-6x+6x

-7x^2+7x+9=0

quadratic\: formula

x_{1,\:2}=\frac{-7\pm \sqrt{7^2-4\left(-7\right)\cdot \:9}}{2\left(-7\right)}

\sqrt{-7^{2} -4(-7)\times9} =\sqrt{301}

x_{1,\:2}=\frac{-7\pm \sqrt{301}}{2\left(-7\right)}

\frac{-7+\sqrt{301}}{2\left(-7\right)}

=\frac{-7+\sqrt{301}}{-2\cdot \:7}

=\frac{-7+\sqrt{301}}{-14}

\frac{-7-\sqrt{301}}{2\left(-7\right)}

=\frac{-7-\sqrt{301}}{-2\cdot \:7}

=\frac{-7-\sqrt{301}}{-14}

answer=\frac{7+\sqrt{301}}{14}

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3 years ago
I don’t feel like doing math
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26.14

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What is the probability of getting 3 queens in a 5-card hand using a standard deck of cards?
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Four friends are creating posters for their presentations, which will be delivered in different locations. Which person should c
Evgen [1.6K]

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Lindsey, who is delivering her speech in a large auditorium

Step-by-step explanation:

Jin, who is delivering her speech to a small group sitting around a table

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2 years ago
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RoseWind [281]

Answer:

A 5

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Parts on the left have the same ratio as parts on the right.

... x/(x+5) = (x -2)/(x +1)

Multiplying by (x+5)(x+1), we get

... x(x +1) = (x -2)(x +5)

... x² +x = x² +3x -10 . . . . eliminate parentheses

... 0 = 2x -10 . . . . . . . . . . subtract x²+x

... 0 = x -5 . . . . . . . . . . . . divide by 2

... 5 = x . . . . . . . . . . . . . . . add 5

3 0
3 years ago
Read 2 more answers
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