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anygoal [31]
3 years ago
11

I need 20 characters idk why, but I need a step by step explanation 5y-3(2-y)=10​

Mathematics
1 answer:
lana66690 [7]3 years ago
8 0

____________________________________________________

Solve for y:

5y-3(2-y)=10​

Distribute the -3 to the variables inside the parenthesis.

5y - 6 + 3y = 10

8y - 6 = 10

Add 6 to both sides

8y = 16

Divide both sides by 8

y = 2

____________________________________________________

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The original quantity is 20 and the new quantity is 15. Adam incorrectly says the percent decrease is about ​14.29%. What is the
Yuki888 [10]

Answer: A. divided the difference of the two quantities by the sum of the two quantities.

===================================================

Explanation:

The difference of the quantities is 20-15 = 5

The sum of the quantities is 20+15 = 35

Dividing those results leads to 5/35 = 0.142857 which rounds to 0.1429

That converts to 14.29%

This is likely the path Adam took. This path is incorrect. The correct steps are shown below

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Difference = 20-15 = 5

Divide the difference over the original quantity

5/20 = 1/4 = 0.25 = 25%

We have a 25% decrease because the new quantity (15) is smaller than the old quantity (20)

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Here's another way to approach the problem

A = old value = 20

B = new value = 15

C = percent change

C = [ (B-A)/A ] * 100%

C = [ (15-20)/20 ] * 100%

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C = -0.25*100%

C = -25%

The negative C value means we have a negative percent change, ie we have a percent decrease. So this is another way to get a 25% decrease.

4 0
2 years ago
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Use the given equation to determine if the points in the brackets are on the graph
dmitriy555 [2]

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<h3>How to determine if the points in the brackets are on the graph?</h3>

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Rewrite as

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Next, we substitute the x and y values in the equation 4x - 3y = -6

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1 year ago
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