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Firdavs [7]
3 years ago
13

Please solve this if you can

Mathematics
1 answer:
Lunna [17]3 years ago
3 0

Answer:

d = 3

Step-by-step explanation:

(7d+3)/4 = 6

Multiply each side by 4

(7d+3)/4*4 = 6*4

(7d+3) = 24

Subtract 3 from each side

7d+3-3 = 24-3

7d = 21

Divide by 7

7d/7 = 21/7

d = 3

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A city doubles its size every 12 years. If the population is currently 500,000, what will the population be in 24 years?
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2,000,000 because 24/12 is 2 so you double it twice
7 0
2 years ago
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Sam wants to surround his garden with fencing. He is using a drawing with a scale factor of 4 feet for every 1 inch.
solmaris [256]
24! 2 plus 4 is 6 and 6 times 4 for the scale factor
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1 year ago
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What is the sum of all positive integers less than 300 which are divisible by 3
drek231 [11]

Answer:

14,850

Step-by-step explanation:

You need the sum of

3 + 6 + 9 + 12 + ... + 294 + 297

Factor out a 3 from the sum

3 + 6 + 9 + 12 + ... + 294 + 297 = 3(1 + 2 + 3 + 4 + ... + 98 + 99)

You need to add all integers from 1 to 99 and multiply by 3.

The sum of all consecutive integers from 1 to n is:

[n(n + 1)]/2

The sum of all consecutive integers from 1 to 99 is

[99(99 + 1)]/2

The sum you need is 3 * [99(99 + 1)]/2

3 + 6 + 9 + 12 + ... + 294 + 297 =

= 3 * [99(99 + 1)]/2

= 3 * [99(100)]/2

= 3 * 9900/2

= 14,850

4 0
2 years ago
Solve for x, show all of your work: -2x – 4 < 10
NNADVOKAT [17]
<span>-2x – 4 < 10
add 4 to both sides
-2x - 4 + 4 < 10 + 4
simplify
-2x < 14
divide both sides by -2
-2x/-2 < 14/-2
simplify
x < -7</span>
3 0
3 years ago
What is the value of the product of -20/48 times 6 in simplified form
KATRIN_1 [288]
-20/48 x 6 =   \frac{-20}{48}    x  \frac{6}{1}

I would cancel out the 6 in the numerator and the 48 in the denominator 
Now I have <u />\frac{-20}{8}  or <u />\frac{-5}{2} reduced.

-5 ÷ 2  = -2 1/2 and that is the answer in simplest form
8 0
3 years ago
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