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Advocard [28]
3 years ago
12

7x + 2y = 7 -14x + 2y = -11 Solve by substitution

Mathematics
1 answer:
kvasek [131]3 years ago
7 0

Answer:

x = 6/7, y = 1/2

Step-by-step explanation:

7x + 2y = 7

-14x + 2y = -11

1) 7x + 2y = 7

2y = 7 - 7x

2) -14x + 2y = -11

-14x + 7 - 7x = -11

- 21x = -11-7

- 21x = - 18

x = 18/21 = 6/7

3) 2y = 7 - 7x = 7 - 7*(6/7) = 7 - 6 = 1

2y = 1

y = 1/2

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4 0
3 years ago
3. find the domain and range of <br>a) 3x-2y+7=0<br>i think in y-intercept form it is y=3/2x + 7/2
bekas [8.4K]
3x-2y+7=0\\\\The\ slope-intercept\ form:\\\\2y=3x+7\ \ \ \ \ /:2\\\\y=\frac{3}{2}x+\frac{7}{2}\\\\The\ domain:x\in\mathbb{R}\\\\The\ range:y\in\mathbb{R}

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3 years ago
Which of the following options have the same value as 75%, percent of 96?
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The choices should be B, C, and E. Hope this helps
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3 years ago
Can someone pls help me? :)
erastova [34]

Step-by-step explanation:

1 t=16/21

2.m=2

3.n=13/7

4.a=2

5.x=6/17

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8 0
3 years ago
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OLga [1]

Answer:

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Step-by-step explanation:

For every time that we multiply powers with the same base we maintain the base and sum the powers. Therefore we have:

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6 0
3 years ago
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