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Yanka [14]
2 years ago
14

What has she done wrong?

Mathematics
1 answer:
Strike441 [17]2 years ago
8 0

Answer:

see explanation

Step-by-step explanation:

Her error is in squaring (2y)²

She has (2y)² = 2y²

when it should be 2y × 2y = 4y²

Then

(2y)² = 6² + 8²

4y² = 36 + 64

4y² = 100 ( divide both sides by 4 )

y² = 25 ( take square root of both sides )

y = \sqrt{25} = 5

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What is the m<br> 52<br> 40<br> 45<br> 54
lidiya [134]

Answer:

○ \displaystyle 54°

Step-by-step explanation:

Use the Triangular Interior Angles Theorem to figure this out:

180° = [3x]° + [2x]° + [5x]°

\displaystyle \frac{180°}{10°} = \frac{[10x]°}{10°} \\ \\ 18 = x

Plug this back into the <em>m</em>∠<em>L</em><em> </em>to get 54°.

I am joyous to assist you anytime.

4 0
3 years ago
Which expression can be used to find the volume of the sphere?
Kryger [21]

Answer:

They used 3.14 for pi:

V=\frac{4}{3} \pi r^3

V=\frac{4}{3} (3.14)(5)^3

Step-by-step explanation:

V=\frac{4}{3}\pi r^3 is the volume of a sphere with radius r.

I think that is the diameter given in the picture.

The radius is half the diameter.

So the radius is 5 since the diameter is 10.

Plug in this gives you:

V=\frac{4}{3} \pi (5)^3

4 0
3 years ago
Read 2 more answers
Which of the following is equivalent??
Katen [24]
(-3 7following is equivalent
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4
7 0
3 years ago
18. 2-(-8) + (-3) =<br> A. 1<br> B. 14<br> C. 12<br> D.7
ioda

Answer:

I think it’s 7 so D

Step-by-step explanation:

4 0
2 years ago
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Abdul rolls a fair six-sided die and a fair four-sided die simultaneously. The sample space of all possible
gregori [183]

Answer: 7/24

Step-by-step explanation:

Probability is the branch of mathematics that is concerned with the numerical descriptions of how likely an event will occur or how likely a proposition is true

The probability that the six-sided die is three or Abdul rolls doubles is 7/24. The calculation is attached.

4 0
3 years ago
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