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saw5 [17]
2 years ago
10

Which expression gives the surface area of a sphere with radius r?

Mathematics
1 answer:
Leviafan [203]2 years ago
5 0

Answer:

Area of sphere is given by 4 · \pi · r^2

Step-by-step explanation:

The surface area of sphere is given by:

Area of sphere =4 · \pi · r^2

Option C and D are correct but  is missing in the options

Option A and B are incorrect.

\pi =3.14 to solve the area of sphere when radius is given a constant value.

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What are RQS and TQS?
yaroslaw [1]

Answer:

m∠RQS = 72°

m∠TQS = 83°

Step-by-step explanation:

m∠RQS +m ∠TQS = m∠RQT

The two angles combine to make a larger angle

So

m∠RQS = (4x - 20)

m∠TQS = (3x + 14)

(4x - 20) + (3x + 14) = 155

Group the Xs and the constants

4x + 3x - 20 + 14 = 155

Combine like terms

7x - 6 = 155

Add 6 to both sides

7x = 161

Divide by 7 on both sides

x = 23

Check:

4(23) - 20 + 3(23) + 14 = 155

92 - 20 + 69 + 14 = 155

155 = 155

But we need to find m∠RQS and m∠TQS. So plug in x = 23 to the values.

m∠RQS = 4(23) - 20 = 72°

m∠TQS = 3(23) + 14 = 83°

Checking:

72 + 83 = 155

8 0
3 years ago
MARKING BRAINLIEST
Zielflug [23.3K]

Answer:

A

Step-by-step explanation:

5/4*4/13=20/182=10/91   you take the red marble out so you -1 from the red and the total bag of marbles then you multiply them to gather to get the combined average  then simplify

8 0
2 years ago
Factor and solve the problems in the photo ……….. pleaseeeee help i haven’t done algebra in 2 years
vladimir1956 [14]

Answer:

30. 2x²-x-1=0

or, 2x²-2x+x-1=0

or, 2x(x-1)+1(x-1)=0

or, (x-1)(2x+1)=0

so, x-1 = 0 or, x = 1

and 2x+1 = 0 or, 2x = -1 or, x = -1/2

so, x = 1 and 1/2

31. 3x²-14x=5

or, 3x²-14x-5=0

or, 3x²-15x+x-5=0

or, 3x(x-5)+1(x-5)=0

or, (x-5)(3x+1)=0

so, x-5=0 or, x=5

and 3x+1=0 or, 3x=-1 or, x=-1/3

so, x = 5 and -1/3

Answered by GAUTHMATH

5 0
3 years ago
Mark jumped 6 feet 9 inches in the long jump competition and George jumped 8 feet 4 inches. How many inches farther did George j
VLD [36.1K]

Answer:

1 foot and 5 inches.

Step-by-step explanation:

He jumped 6 ft. 9 inch. 6.9+1.5 = 8.4

8 0
2 years ago
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Four more than twice a number is twenty.
wariber [46]

Answer:

ig

Step-by-step explanation:

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