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valina [46]
3 years ago
13

Leanne earned $400 and $550 in interest the last 2 years. How much interest must she earn this year so that her average earnings

over the three year period is more than $600?
Mathematics
1 answer:
polet [3.4K]3 years ago
3 0

Answer:

850

Step-by-step explanation:

400+550+850=1800. 1800/3= 600

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Negative solution for Multi-step equations
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Answer:

\frac{1}{2}(4x+6)+3x=7x+9

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Step-by-step explanation:

By putting the numbers in the given equation,

\frac{1}{2}(4x+6)+3x=7x+9

2x + 3 + 3x = 7x + 9

5x + 3 = 7x + 9

(5x + 3) - 7x = (7x + 9) - 7x

(5x - 7x) + 3 = 9

-2x + 3 = 9

(-2x + 3) - 3 = 9 - 3

-2x = 6

-\frac{2x}{2}=\frac{6}{2}

-x = 3

x = -3

Therefore, our equation is correct which has a negative result.

In place of 6 if we use 8, value of x will be negative again.

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vlabodo [156]
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Answer:

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