$(x - 2)^2=49\\ \\ x^2-4x +4 -49=0\\ \\x^2-4x -45 = 0\\ \\\Delta = b^{2}-4ac = (-4)^{2}-4*1* (-45)= 16+180=196 \\ \\x_{1}=\frac{-b-\sqrt{\Delta }}{2a} =\frac{4-\sqrt{196}}{2}=\frac{4-14}{2}=\frac{-10}{2}=-5 \\ \\x_{2}=\frac{-b+\sqrt{\Delta }}{2a} =\frac{4+\sqrt{196}}{2}=\frac{4+14}{2}=\frac{18}{2}=9 \\ \\Answer : \ x=-5 \ or \ x= 9$

8 0

3 years ago

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Select the two figures that are similar to each other.

Elodia [21]

Option 4 is twice as big as option 2 those two are the ones similar to each other

3 0

3 years ago

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What is the arc measure for(BC)

podryga [215]

I’m pretty sure it is 98 degrees because you are supposed to double the angle of the arc...if that makes sense. Please correct me if I am wrong! Sorry if this doesn’t help much.

4 0

3 years ago

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Megan constructed triangle ABC. In Megan’s triangle, m∠A is represented by x°, m∠B is 4 times greater than m∠A, and m∠C is 30° l

sergeinik [125]

Angle A =x

Angle B is 4x

Angle C is 5x-30

So the answer is A C andD

7 0

3 years ago

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