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vichka [17]
3 years ago
5

Help me asap please

Mathematics
1 answer:
iren [92.7K]3 years ago
7 0

A(-3, -1); B(2, -1), C(2, 3)

You can read the length of AB and BC.

|AB| = 5

|BC| = 4

Use the Pythagorean theorem:

|AC|^2=5^2+4^2\\\\|AC|^2=25+16\\\\|AC|^2=41\to|AC|=\sqrt{41}\\\\|AC|\approx6.4

The perimeter:

P=|AB|+|BC|+|AC|\\\\P=5+4+6.4=15.4

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Y = -5x + 15 2x + y = 12
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Answer:

x = 1, y = 10

Step-by-step explanation:

y = -5x + 15 --- Equation 1

2x + y = 12 --- Equation 2

Substitute y = -5x + 15 into Equation 2:

2x + y = 12

2x - 5x + 15 = 12

Evaluate like terms.

15 - 3x = 12

Isolate -3x.

-3x = 12 - 15

Evaluate like terms.

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Find x.

x = -3 ÷ -3

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Substitute x = 1 into Equation 2:

2x + y = 12

2(1) + y = 12

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Isolate y.

y = 12 - 2

y = 10

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