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3 years ago

Correctly factor the expression 15a-6b+36 using the greatest common factors

Mathematics

1 answer:

kirza4 [7]3 years ago

4 0

Answer:

3 ( 5a - 2b + 12)

Step-by-step explanation:

15 = 3 * 5

6 = 2 * 3

36 = 2 * 2 * 3 * 3

GCF = 3

15a - 6b + 36 = (3* 5 * a) - (3 *2 * b) + (3 * 12)

= 3 ( 5a - 2b + 12)

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4 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

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3 years ago

The mean of 15 numbers is 12. An extra number is included and the mean increases to 13. What the extra number?

Studentka2010 [4]

Answer: 28

Step-by-step explanation:

The mean of 15 numbers = 12

Then , the sum of the numbers = 12x15 = 180

Let the extra number included be $x$ , then

The new sum = $x + 180$

And the new total number will increase from 15 to 16

new mean = 13 , so we have :

$\frac{x+180}{16} = 13$

$x+ 180 = 16(13)$

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3 years ago