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DENIUS [597]
3 years ago
6

Every seventh-grade student at Martin Middle School takes one world language class.

Mathematics
1 answer:
koban [17]3 years ago
6 0

Answer:

s = 180

Step-by-step explanation:

s is the total number of seventh-grade students

1/10s take French which is 18

1/10s = 18

s = 18(10)

s = 180

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Mark can paint a room in 3 hours, Frank can paint an identical room in 4 hours. How many hours would it take Mark and Frank to p
IRINA_888 [86]

All you have to do is find the LCD of the number of hours Mark and Frank uses to paint a room.

Mark - 3

Frank - 4

So list the numbers that are a result of a number and 3 and 4

(example: 4 x 1 = 4, 3 x 3 = 9)

3 - 3, 6, 9, 12, 15

4 - 4, 8, 12, 16

The list goes on and on but what we need to get is the LCD so it means it's the least number that 3 and 4 have in common.


3 and 4 both have 12 so The LCD of 3 and 4 is 12.

Another way of finding the LCD could be multiplying the numbers together, but it's not always gonna be the least number. Remember that LCD stands for Least Common Denominator.

How many hours would it take Mark and Frank to paint the room together at their respective rates?

The answer is - 12 hours

8 0
4 years ago
Jason solved the following equation to find the value for x. –8.5x – 3.5x = –78 x = 6.5 Describe how Jason can check his answer.
sweet-ann [11.9K]

Answer: Jason can substitute x=6.5 into the equation. The left side of the equation must be equal to the right side of the equation.

Step-by-step explanation:

The equation -8.5x-3.5x=-78 must be solved by calculating the value of the variable x:

Add like terms:

-12x=-78

Divide both sides by -12:

\frac{-12x}{-12}=\frac{-78}{-12}\\\\x=6.5

Once Jason solves for x, he has to substitute x=6.5 into the equation and simplify to check his answers.

If his answer is right, the left side of the equation will be equal to the right side of the equation.

Then:

-12(6.5)=-78\\-78=-78

x=6.5  is a solution of the equation.

3 0
3 years ago
Read 2 more answers
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Sonbull [250]
The answer is 18 .
All you have to do is swich the numbers

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4 years ago
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Math troubles :/ greatly appreciated if you can help
RUDIKE [14]

Answer:

V=523.33

Step-by-step explanation:

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V=\frac{4\pi 5^3}{3}

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V=523.33

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