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Grace [21]
3 years ago
7

The sum of 9 is multiplied by -2 and the answer is 90. find my number

Mathematics
1 answer:
OLga [1]3 years ago
8 0
The number is 45 because 9 times 5 is 45 times -2 is 90
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Show your work <br> 2x+y=-4;5x+3y=-6
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Answer:

x = -6

y = 8

Step-by-step explanation:

Using substitution method.

2x + y = -4 -----------(I)

      y = - 4 - 2x -----------(II)

5x + 3y = -6 -------------------(III)

Substitute y = -4 -2x in equation (III)

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Combine like terms

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              -x = -6 + 12

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               x = -6

Substitute x = -6 in equation (II)

y = - 4 - 2*(-6)

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y = 8

4 0
3 years ago
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Answer:

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Step-by-step explanation:

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6 0
3 years ago
What is the answer please explain?
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E is 131 degrees (opposite angles are equal)

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