2 years ago

Which are the solutions of the equation x^2+4x+4=25

Mathematics

1 answer:

pav-90 [236]2 years ago

8 0

I think the answer is 3,-7

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Simplify (-x^2 – 28x + 7) + (-7x^2 + 14x + 8).

Anon25 [30]

Add numbers with the same amount of variables

-x^2 + (-7x^2) = -8x^2

– 28x (+ 14x )= -14x

7 (+ 8) = 15

-18x² - 14x + 15 is your answer

hope this helps

6 0

2 years ago

An equation that models the sequence 400, 200, 100, 50, ...

Serga [27]

For this, let's have:
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2 years ago

What is the arc measure of BDC in degrees?<br> (4k + 159)<br> P<br> (2k + 153)

andre [41]

<h2>Explanation:</h2><h2></h2>

The diagram is missing but I'll assume that the arc BDC is:

$(4k + 159)^{\circ}$

And another arc, let's call it FGH. measures:

$(2k + 153)^{\circ}$

If those arc are equal, then this equation is true:

$(4k + 159)^{\circ}=(2k + 153)^{\circ} \\ \\ (4k + 159)=(2k + 153) \\ \\ \\ Solving \ for \ k: \\ \\ 4k-2k=153-159 \\ \\ 2k=-6 \\ \\ k=-\frac{6}{2} \\ \\ k=-3$

Substituting k into the first equation:

$\angle BDC=(4(-3)+159)^{\circ} \\ \\ \angle BDC=(-12+159)^{\circ} \\ \\ \boxed{\angle BDC=147^{\circ}}$

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2 years ago

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Help me solve this equation!<br> 4x + 10 = -2y<br> Remember to use the y = mbx+b formula!

Black_prince [1.1K]

Y=-2x-5
You can divide by -2 on both sides of the equal sign getting the answer above.

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2 years ago

What two numbers add up to 5 but multiply to get -4.

maksim [4K]

Answer:

1 and 4

Step-by-step explanation:

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2 years ago

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