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2 years ago

PLEASE HELPPP ILL GIVE BRAINLIESTTTT

Mathematics

2 answers:

mafiozo [28]2 years ago

5 0

Answer:

Step-by-step explanation:

The interior angles of a triangle always add up to 180°.

As QE=ED=QD

so, ∠Q=∠E=∠D=180°/3=60°

As, ∠D=5x+20

60=5x+20

5x=40

x=8

Hope, this helps you.

kati45 [8]2 years ago

5 0

Answer:

x= 8

Step-by-step explanation:

QE=ED=QD

SO;

Sum of angles =180

each angle = 60

5x+20= 60 —> 5x =60-20 —> 5x = 40

x = 40/5 —> x = 8

I hope I helped you^_^

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Solve by completing the square<br><br>x squared +14x - 51=0

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3 years ago

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RideAnS [48]

Answer:

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Step-by-step explanation:

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2 years ago

The answer choices are 11 1 2.48 6

Fudgin [204]

Answer:

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Step-by-step explanation:

This question is essentially asking one to find the vertex of the parabola formed by the given equation. One could plot the equation, but it would be far more efficient to complete the square. Completing the square of an equation is a process by which a person converts the equation of a parabola from standard form to vertex form.

The first step in completing the square is to group the quadratic and linear term:

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After doing so, add a constant such that the terms inside the parenthesis form a perfect square, don't forget to balance the equation by adding the inverse of the added constant term:

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Now take the balancing term out of the parenthesis:

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Simplify:

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$(1, 11)$