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kari74 [83]
3 years ago
12

I need help with solving the equations by using substitution

Mathematics
1 answer:
Fittoniya [83]3 years ago
3 0
Given:
y = -2x + 4
2y = -6x + 12

2y = -6x + 12
2(-2x + 4) = -6x + 12
-4x + 8 = -6x + 12
-4x + 6x = 12 - 8
2x = 4
x = 4/2
x = 2

y = -2x + 4
y = -2(2) + 4
y = -4 + 4
y = 0

2y = -6x + 12 ; x = 2 ; y = 0
2(0) = -6(2) + 12
0 = -12 + 12
0 = 0

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2 years ago
The lay in Burlington collected $3 930 in overdue fees last year. This year, the library
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We conclude that the percent of decrease = 20%

Step-by-step explanation:

Given

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  • Amount of decrease = $3930 - $3144 = $786

Using the formula

Percent of decrease = ( amount of decrease / orignal amount × 100 ) %

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4 0
2 years ago
Quadrilateral FLAG has coordinates F(1,5), L(6,3), A(3,-1), and G(-2,1). Which
Anettt [7]

Answer:

  • B. Quadrilateral FLAG is a parallelogram because opposite sides are parallel.

Step-by-step explanation:

<em>Refer to attached.</em>

Plot the point and connect in order FLAG.

<u>We see </u>

  • FL ║ GA
  • GF ║ AL
  • FA and GL are not perpendicular

<u>All the above can be confirmed by calculating the slopes:</u>

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  • m(GA) = (1 + 1)/(-2-3) = -2/5
  • These are same.
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  • m(AL) = (3 + 1)/(6 - 3) = 4/3
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  • m(GL) = (3 - 1)/(6 +2) = -1/4
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The quadrilateral is a parallelogram.

Correct choice is B

3 0
3 years ago
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