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eduard
2 years ago
7

Solve for this equation z^2-12z=-13

Mathematics
1 answer:
ASHA 777 [7]2 years ago
5 0

Answer:

z=\sqrt{-1}

Step-by-step explanation:

z^2-12z=-13\\z^2-\frac{-12}{+12} =-13+12\\z^2=-1\\\sqrt{z^{2} } =\sqrt{-1}\\ z=\sqrt{-1}

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Which of the following points lies on the graph of y=x^2-5?
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Answer:

(3, 4)

Step-by-step explanation:

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PLEASE I NEED HELP 10 points (dont waste them) What is the area of this figure?
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Answer:

1280

Step-by-step explanation:

I think it is 1280 because 20*16*8/2=1280. I am not 100% sure.

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I’m trying to correct this problem but I don’t know how can someone help me
BartSMP [9]

Remark

It is not a straight line distance from the park to the mall. None of the answers give you that result. And if you know what displacement is, none of the answers are really displacement either. The distance is sort of a "as the crow flies." distance. There's a stop off in the middle of town.

Method

You need to use the Pythagorean Formula twice -- once from the park to the city Center and once from the city center to the mall.

Distance from the Park to the city center.

a = 3   [distance east]

b = 4  [distance south]

c = ??

c^2 = 3^2 + 4^2        Take the square root of both sides.

c = sqrt(3^2 + 4^2)

c = sqrt(9 + 16)          Add

c = sqrt(25)

c = 5

So the distance from the park to the city center is 5 miles

Distance from City center to the mall

a = 2 miles [distance east]

b = 2 miles [distance north]

c = ??

c^2 = a^2 + b^2   Substitute

c^2 = 2^2 + 2^2   Expand this.

c^2 = 4 + 4

c^2 = 8             Take the square root of both sides.

sqrt(c^2) = sqrt(8)

c = sqrt(8)          This is the result

c = 2.8

Answer

Total distance = 5 + 2.8 = 7.8

6 0
3 years ago
Solve this equation <br><br> |x − 5| + 2 = 5
Amanda [17]

Step-by-step explanation:

or, x + 5 + 2 = 5

or, x + 7 = 5

or, x = 5 - 7

or, x= -2

4 0
3 years ago
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