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amid [387]
3 years ago
13

Why is it helpful to write a number as a product of primes

Mathematics
1 answer:
Debora [2.8K]3 years ago
5 0
Because if you are multiplying or dividing, you can regroup numbers to make it easy so exg
80 times 45 might look scary but it is really 2 times 2 times 2 times 2 times 3 times 3 times 5 times 5
regroup to make
(2 times 5) times (2 times 5) times (2 times 2 times 3 times 3)=10 times 10 times (6 times 6)=10 times 10 times 36=3600

dividing
188/132
188=2 times 2 times 47
44=2 times 2 times 3 times 11
so it becomes (2 times 2)/(2 times 2) times (47/(3 times 11))=1 times 47/33=47/33
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lbvjy [14]

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5 0
3 years ago
Read 2 more answers
3/5x + 3 = 6 whats is x?​
KengaRu [80]

Answer:

<h3>X = 3/5 </h3>

3/5x + 3 = 6

3/5x = 6 - 5

3/5x = 1

<h3><u>Multiplying </u><u>both </u><u>the </u><u>sides </u><u>with </u><u>5x </u></h3>

3/5x (5x) = 1* 5x

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8 0
2 years ago
The dimensions of a square are altered so that 8 inches is added to one side while 3 inches is subtracted from the other. The ar
Alex_Xolod [135]

Answer

Find out the original side length of the square .

To prove

Let us assume that the original length of the square be x.

Formula

Area\ of\ rectangle = Length\times Breadth

As given

The dimensions of a square are altered so that 8 inches is added to one side while 3 inches is subtracted from the other.

Length becomes  = x + 8

Breadth becomes = x -3

The area of the resulting rectangle is 126 in²

Put in the formula

(x + 8) × (x - 3) = 126

x² -3x + 8x -24 = 126

x ²+ 5x = 126 +24

x² + 5x - 150 = 0

x² + 15x - 10x - 150 = 0

x (x + 15) -10 (x +15) =0

(x + 15)(x -10) =0

Thus

x = -15 , 10

As x = -15 (Neglected this value because the side of the square cannot be negative.)

Therefore x = 10 inches be the original side of the square.






3 0
3 years ago
Solve: the quantity 2x minus 10 divided by 4 = 3x
AleksAgata [21]

Answer:

x=-2.5

Step-by-step explanation:

2x-10÷4=3x

2x-2.5=3x

-2.5=x

7 0
3 years ago
Read 2 more answers
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