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KATRIN_1 [288]
3 years ago
7

PLEASE HELP

Mathematics
2 answers:
lubasha [3.4K]3 years ago
7 0

Answer:

(a+b)^2+(a-b)^2=2(a^2+b^2)

expanding:

a² + 2ab + b² + a² -2ab + b² = 2a² + 2b²

2a² + 2b² = 2a² + 2b²

AnnZ [28]3 years ago
4 0

Answer:

with what?

Step-by-step explanation:

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in circle O the radius is 4ft and the measure of minor arc ab is 120 degrees find the length of minor arc ab to the nearest inte
KIM [24]

Answer:

8\:\text{ft}

Step-by-step explanation:

The length of the arc is proportional to the degree measure it in encompasses. Since there are 360 degrees in a circle and the arc is 120 degrees, the arc's length will be \frac{120}{360}=\frac{1}{3} of the circle's length (circumference).

The circumference of a circle is given by 2\pi r, where r is the radius of the circle. Therefore, the circumference of the circle is 2\pi(4)=8\pi. As we found earlier, the length of the arc is \frac{1}{3} of this circumference. Therefore, the arc's length is 8\pi\cdot \frac{1}{3}=\frac{8\pi}{3}.

To the nearest integer, this is \approx \boxed{8\:\text{ft}}.

4 0
3 years ago
I need help with number 33 thank u!
Rufina [12.5K]

Answer:

C. 2,150

Step-by-step explanation:

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7 0
3 years ago
There were 51 Elementary schools in Greenville County. Let's pretend that each elementary school at 805 students how many Elemen
aksik [14]

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Step-by-step explanation:

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Y^2-25 is the difference of squares
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(x+5) (x-5)
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