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padilas [110]
4 years ago
9

Factor completely: 21a+27

Mathematics
1 answer:
Lina20 [59]4 years ago
8 0

Answer:

3(7a + 9)

Step-by-step explanation:

21a + 27

3(7a + 9)

When you expand

3 x 7a + 3 x 9

21a + 27

You might be interested in
Which Venn diagram correctly describes the relationship between Set R and Set Q?
Tanzania [10]

Answer:

D. because all irrational numbers are real numbers.

Step-by-step explanation:

Real numbers include virtually all numbers we can come up with, either negative or positive, rational or irrational, decimals, etc. They are not imaginary numbers.

Irrational numbers include all numbers that cannot be written as a quotient of two integers. They are numbers whose decimals are never terminating. Examples include π, √2 etc.

Irrational are a subset of real numbers.

Therefore, the correct venn diagram that shows this relationship between Set R {real numbers} and Set Q {irrational numbers} is the venn diagram in option D (last option), because, all irrational numbers are real numbers.

5 0
3 years ago
Tim is taking the train to Seattle to visit his grandparents. He was given $15 to spend on snacks and reading material. Granola
Anon25 [30]

Answer:

6 each

Step-by-step explanation:

Add 1 granola bar $1.15 plus one magazine $1.25 = $2.40

$15.00/$2.40 = 6.25

6 granola bars x $1.15 = $6.90

6 magazines x $1.25 = $7.50

$6.90 + $7.50 = $14.40

7 0
3 years ago
{3/4 x (3/3/4 ÷ 5/16)} -3/1/3
slega [8]
I did this online and got this hope this helps

6 0
3 years ago
How do I figure this one out whats the answer
Semenov [28]

Look at the picture

3 0
4 years ago
Solve: <br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7Bx%7D%20%20%2B%20%20%5Csqrt%7B5%20%2B%20x%7D%20%20%3D%20%2015%20%5Cdiv%
blagie [28]
X = 4

Explanation:

sqrt(x) + sqrt(5 + x) = 15 / sqrt(5 + x)

sqrt(5 + x)[sqrt(x) + sqrt(5 + x)] = 15

sqrt(5x + x^2) + 5 + x = 15

sqrt(5x + x^2) = 10 - x

Take square of both sides

5x + x^2 = (10 - x)^2

5x + x^2 = 100 - 20x + x^2

Cancel x^2

5x = 100 - 20x

25x = 100

x = 4
4 0
3 years ago
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