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mart [117]
2 years ago
11

What value of m makes the equation 5/2(4m-8)- 2(6m -7)= -10 true?

Mathematics
1 answer:
Dmitrij [34]2 years ago
4 0
\dfrac{5}{2}(4m-8)- 2(6m -7)= -10\\\\\\\dfrac{5\cdot4}{2}m-\dfrac{5\cdot8}{2}- 2\cdot6m -2\cdot(-7)= -10\\\\\\\dfrac{20}{2}m-\dfrac{40}{2}-12m+14=-10\\\\\\10m-20-12m+14=-10\\\\-2m-6=-10\quad|\cdot(-1)\\\\2m+6=10\\\\2m=10-6\\\\2m=4\quad|:2\\\\\boxed{m=2}

Answer C.
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Isla is dividing 3x3 + x2 - 12x - 4 by x + 2 using a division table.
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A. A = -10 x, B = -4

<u>Explanation:</u>

Given:

For A:

The Quotient of the Operation is -5 x

The Divisor of the Operation is 2

So the remainder is -10 x

For B:

The Quotient of the Operation is -2

The Divisor of the Operation is +2

So the remainder is -4

So, the missing values in the table is A = -10 x and B = -4

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Answer:

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Step-by-step explanation:

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Masteriza [31]

Answer:

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Step-by-step explanation:

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A science test, which is worth 100 points, consists of 24 questions. Each question is worth either 3 points or 5 points. If x is
anzhelika [568]
You need to solve for one variable in equation 1 and substitute it in equation 2 to solve.

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y= number of 5 pt questions
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5y= point value of 5 pt questions

x+y=24
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x=24-y

Substitute in equation 2:
3x+5y=100
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Substitute y=14 back in to solve for x:
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Answer:

Step-by-step explanation:

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8 0
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