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tatiyna
4 years ago
11

For question 21 ... I need the answer and explain how I got the answer !!!

Mathematics
1 answer:
maks197457 [2]4 years ago
3 0

Answer:

27=3c-3(6-2c)

Open the brackets (multiply 6 and -2c by -3)

27=3c-18+6c

Add 3c and 6c

27=9c-18

Add 18 to both sides

45=9c

Divide by 9

c=5 (45/9)

now to check this just substitute c (5) into the equation

27=(3*5)-18+(6*5)

27=15-18+30

27=30-3

27=27

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Can you PLEASE help me!!!
alekssr [168]
N+2(2n-5)=20

Distribute
n+4n-10=20

Combine like terms
5n-10=20

Add 10 to both sides
5n=30

Divide both sides by 5
n=6

Final answer: 6
3 0
3 years ago
Read 2 more answers
If 14 over 3 equals x over y to the second power than 14 over x equals
aleksklad [387]
We have that
(14/3)=(x/y²)-----------> 14*y²=3*x

then
(14/x)=(3/y²)

the answer is
3/y²

6 0
4 years ago
What is the distance between the points (-4, 6) and (1, -6)?
Oksanka [162]

Answer:

The distance between these 2 points is 13.

Step-by-step explanation:

Picture the 2 points on a graph as a right triangle, where the hypotenuse of that right triangle is the distance between the points. It is very easy to find the length of the legs of that triangle, and you can use those legs to calculate the length of the hypotenuse.

First, find the vertical distance, or the distance between the y-coordinates. Either just look at a graph and count, or subtract them.

-6-6=-12

Distance is an absolute value from 0, so -12 is the same as 12.

Next, find the horizontal distance between the x-coordinates.

1--4=5

Now, we have the length of the legs, 5 and 12. Use the pythagorean theorem to find the length of the hypotenuse:

a^2+b^2=c^2\\5^2+12^2=c^2\\25+144=c^2\\c^2=169\\c=\sqrt{169}\\c=13

The distance between these 2 points is 13.

6 0
3 years ago
The company’s Chief Financial Officer plots material costs on a graph, where the x-axis represents the number of pounds of mater
Alona [7]

Answer: 1, 2, 2

Step-by-step explanation:

8 0
3 years ago
The ratio of girls and boys in a swimming club was 2:5 .There we’re 20 girls.How many boys were there at the club?
nekit [7.7K]

Answer:

50

Step-by-step explanation:

divide 20 girls by 2 girls to get 10.

multiply 5 by 10 to get 50 boys.

5 0
3 years ago
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