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3 years ago

I need help on how much. Will he spend on the cell phone 3 in years

Mathematics

2 answers:

rodikova [14]3 years ago

7 0

Y=30x+150 you put 3 in for x which is y=30(3)+150 y=90+150 y=240

prisoha [69]3 years ago

5 0

Answer:
$1230

Explanation:
First of all, your initial equation is wrong. It should be:
cost = 30m + 150

To find how much 3 years will cost you have to first find how many months are in 3 years:
12 • 3 = 36
Then substitute 36 for m in the equation:
cost = 30(36) + 150
Then solve:
C = 30(36) + 150
C = 1080 + 150
C = 1230

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3 years ago

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A tailor cuts 2 3/4 yards from a roll of fabric to make one curtain.

Otrada [13]

Answer:

You know, I really don’t like the 312 notation, I think it’s a lot more confusing than writing 3.5 or even 72. I’ll use the latter here, to make the math easier.

Okay, Erica started with 72 yards of fabric. Then, she uses 2/3 of that. But how much is 23 of 72? All you have to do is multiply!

72⋅23=146=73

Alright, she used 73 yards of fabric in the curtain, if you take that out of the total how much will be left?

72−73=21−146=76

Here it is, she will have 76 yards of fabric left. If you want the answer in that notation, it is 116.

You know, I really don’t like the 312 notation, I think it’s a lot more confusing than writing 3.5 or even 72. I’ll use the latter here, to make the math easier.

Okay, Erica started with 72 yards of fabric. Then, she uses 2/3 of that. But how much is 23 of 72? All you have to do is multiply!

72⋅23=146=73

Alright, she used 73 yards of fabric in the curtain, if you take that out of the total how much will be left?

72−73=21−146=76

Here it is, she will have 76 yards of fabric left. If you want the answer in that notation, it is 116.

7 0

2 years ago

A large spherical structure has a 37.5-foot radius. The sphere is covered with panels. If each panel has an area of about 49 ft2

Citrus2011 [14]

Answer:

Option (1)

Step-by-step explanation:

Radius of the spherical structure = 37.5 feet

Surface area of each panel = 49 square feet

Sphere is covered with panels.

Therefore, area of the panels needed = $\frac{\text{Total surface area of the sphere}}{\text{Area of one panel}}$

Surface area of the sphere = 4πr²

Here 'r' = radius of the sphere

For a sphere having radius 'r' = 37.5 feet,

Surface area of the sphere = 4π(37.5)²

= 17671.5 feet²

Number of panels required to cover the sphere = $\frac{17671.5}{49}$

= 360

Therefore, Option (1) will be the answer.

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2 years ago

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