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kkurt [141]
3 years ago
15

Factor 21a–27.

Mathematics
2 answers:
Ganezh [65]3 years ago
8 0

Answer:

3(7a - 9)

Step-by-step explanation:

21a–27

3*7*a - 3*9

Factor out 3

3(7a - 9)

vlada-n [284]3 years ago
4 0

Answer:

3(7a-9)

Step-by-step explanation:

The greatest common factor between 21a and 27 is 3. Hope this helps!

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Write an equation of the line that passes through (-3,3) and is perpendicular to the line 2y=8x-6
jok3333 [9.3K]

Answer:

y = (-1/4)x + 9/4

Step-by-step explanation:

2y = 8x - 6

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Equation of line:  y-3 = (-1/4)(x-(-3))

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3 0
3 years ago
Factor completely.<br> 81-100x^2
Mandarinka [93]

Answer:

(9-10x)(9+10x) (I think this is the answer but I'm not one hundred percent sure)

Step-by-step explanation:

First, you can recognize that both numbers (-100x^2 and 81) are a difference of squares, in which means that they both can be square routed. Then, plug in the square routes of the numbers into (9-10x)(9+10x). 9 is the square route of 81 and 10 is the square route of 100. Make sure that when you put the numbers in the parenthesis that there is one negative and positive number since a negative multiplied by a positive makes a negative, hence making 100 negative. I hope that helped.

5 0
3 years ago
Read 2 more answers
What is the sum of 14.34 + 9.7?<br><br> 1.531<br> 15.31<br> 24.04<br> 2.404
oee [108]

Answer:

C also known as 24.04

Step-by-step explanation:

14.34+9.7

=14.34+9.7

=24.04


-lavira :)

5 0
3 years ago
Read 2 more answers
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