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Alex17521 [72]
3 years ago
13

The sum of 4 times a number and 15 is 47. Find the number.

Mathematics
2 answers:
Bezzdna [24]3 years ago
7 0

Answer:

The number is 8.

Step-by-step explanation:

Write an equation then solve by isolating the variable.

let x be the number

4x + 15 = 47  Subtract 15 from both sides

4x = 47 - 15

4x = 32     Divide both sides by 4

x = 32/4

x = 8

Therefore the number is 8.

kipiarov [429]3 years ago
6 0

Answer:

8

Step-by-step explanation:

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For a rectangle with length of
AveGali [126]

Answer:

2x+5

Step-by-step explanation:

Formula for the perimeter of a reactangle= 2(l+b)

So,

2(l+b) = 10x+18

2(3x+4 + b) = 10x+18

Rearrange and solve

3x+4+b = 5x+9

b = 5x+9 - 3x - 4

b = 2x+5

Thus the measurement of the width = 2x+5

Hope this helps

6 0
2 years ago
577 rounded to the nearest ten
anygoal [31]

The correct answer 580

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3 years ago
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mr Goodwill [35]
15.28 I think it is the answer bc it said total so u add all the numbers. I added them and it gave me 15.28
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3 years ago
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Use the compound interest formula to compute the total amount accumulated and the interest earned.
mezya [45]
A=3,500×(1+0.011÷12)^(12×4)
A=3,657.36

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6 0
3 years ago
Mrs. Adams deposited $12,000 into an account that earns an annual simple interest rate of 3.25%. She makes no other deposits or
lisabon 2012 [21]

Answer:

<em>Mrs. Adams will earn $3,120 of interest at the end of year 8.</em>

Step-by-step explanation:

<u>Simple Interest</u>

In simple interest, the money earns interest at a fixed rate, assuming no new money is coming in or out of the account.

We can calculate the interests earned by an investment of value A in a period of time t, at an interest rate r with the formula:

I=A.r.t

Mrs. Adams deposited an amount of A=$12,000 into an account that earns an annual simple interest rate of r=3.25%. We must find the interest earned in t=8 years. The interest rate is converted to decimal as:

r=3.25/100=0.0325

The interest is then calculated:

I=12,000\cdot 0.0325\cdot 8=3,120

Mrs. Adams will earn $3,120 of interest at the end of year 8.

7 0
3 years ago
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