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Harrizon [31]
3 years ago
9

42a2-72a-24 Factoring

Mathematics
2 answers:
Colt1911 [192]3 years ago
8 0

Answer:

6(7a+2) (a-2)

Step-by-step explanation:

Add and subtract the second term to the expression and Factor by grouping.

I'm not really sure but I hope this is the answer

Svetlanka [38]3 years ago
6 0

9514 1404 393

Answer:

  6(a -2)(7a +2)

Step-by-step explanation:

Removing a common factor of 6 can make the quadratic factors easier to find.

  = 6(7a^2 -12a -4)

We want to find factors of (7)(-4) that have a total of -12. It doesn't take much search to see they are (-14)(2), so the expression can be written as ...

  = 6(7a^2 -14a +2a -4) = 6((7a^2 -14a) +(2a -4)) . . . . rewrite 'a' term; group pairs

  = 6((7a(a -2) +2(a -2)) . . . . factor pair groups

  = 6(a -2)(7a +2) . . . . . . . . finish factoring

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Three times the sum of a number and 15 is 24
allsm [11]

Answer:

\huge\boxed{\sf x = -7}

Step-by-step explanation:

<em>Let the number be x </em>

So,

=> The sum of number and 15 is x + 15

=> Three times will be 3(x+15)

<u>Given that</u> it equals 24

<u>So, the given condition is:</u>

3(x+15) = 24

<em>Resolving Parenthesis</em>

3x + 45 = 24

<em>Subtracting 45 to both sides</em>

3x = 24 - 45

3x = -21

<em>Dividing both sides by 3</em>

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3 years ago
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Please help and show work if you can​
krok68 [10]

Answer:

7.  x = 5

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9. x = 21, y = 39

Step-by-step explanation:

For a parallelogram, the lengths across intersection are equal.

7. For a parallelogram, the lengths across intersection are equal.

So that,

3x = 4x - 5

4x - 3x = 5

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8. For a parallelogram, the lengths across intersection are equal.

So that,

2x = 4

x = \frac{4}{2}

x = 2

and

y - 1 = 2y -7

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Thus,

3x = (4x - 21)

3x = 4x - 21

x = 21

and

3y = (y + 78)

3y = y + 78

3y - y = 78

2y = 78

y = \frac{78}{2}

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y = 39

x = 21, y = 39

4 0
2 years ago
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Answer:

2

Step-by-step explanation:

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Answer:

l = 14 w = 7

Step-by-step explanation:

14 x 2 = 28

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Answer:

The answer is 18.

Hope this helps!! :))

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