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Nastasia [14]
3 years ago
15

Can anyone help me I would really appreciate it.

Mathematics
1 answer:
Alexandra [31]3 years ago
8 0

Answer:

7c + 4 = 8

7c = 8 -4

7c = 4

c=4/7

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In a school,3/5 of the pupils were boys and there were 240 girls. How many boys were in the school.
zepelin [54]

Answer:

If 2/5 is 240 then 1/5 is 120..multiply 120 by 5 which is 600 so...

600=total

Then..multiply 120 by 3 which will give the 3/5 boys which is 360 so...

360 boys

Step-by-step explanation:

8 0
3 years ago
Pilar says that two linear systems below have the same solution. (see picture) Is she correct? Explain.
wariber [46]
The first set:

3x + 2y = 2  ---1)
5x + 4y = 6  ---2)

From 1), multiply all by 2, 6x + 4y = 4  ---3)

3) - 2),

6x + 4y - (5x + 4y) = 6 - 4
6x + 4y - 5x - 4y = 2
x = 2

Sub in x = 2 into 1),

3(2) + 2y = 2
2y = -4
y = -2

(2 , -2)


The second set:

3x + 2y = 2  ---1)
11x + 8y = 10  ---2)

From 1), multiply all by 4, 12x + 8y = 8 ---3)

3) - 2),

12x + 8y - (11x + 8y) = 8 - 10
12x + 8y - 11x - 8y = -2
x = -2

From this x value alone, we can tell that these two linear systems do NOT have the same solution as they meet at different coordinates.

Hope this helped! Ask me if there's any working from here that you don't understand! :)

5 0
3 years ago
Read 2 more answers
B. Find the angle measures.<br> 7x+<br> 7<br> 9x + 12<br> 490
Lubov Fominskaja [6]
Is 7x+7 and then what. Iam confused
5 0
3 years ago
Name the coefficient, base and power for each
Ede4ka [16]
3 is your coefficient
7 0
3 years ago
The line Graphed on the grid represents the first of two equations in a system of linear equations.
RideAnS [48]

Answer:

It’s A

Step-by-step explanation:

I think

7 0
3 years ago
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