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Westkost [7]
3 years ago
12

Use the substitution method to solve the system of equations. Choose the correct ordered pair. 3x – y = 7 2x – 2y = 2

Mathematics
2 answers:
quester [9]3 years ago
5 0
Y=2, and x=3 so it is c
makkiz [27]3 years ago
3 0

Answer:

The solution set is (3,2)

C is correct

Step-by-step explanation:

Given: System of equation.

3x-y=7

2x-2y=2

We will solve x and y using substitution method.

3x-y=7

y=3x-7------------------(1)

Substitute into 2x-2y=2

2x-2(3x-7)=2

2x-6x+14=2

-4x=-12

x=3

Put x=3 into eq(1)

y=3(3)-7

y=2

Hence, The solution set is (3,2)

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Answer:

The answer to your question is 20 feet

Step-by-step explanation:

Data

A = (-2, 1)

B = (4, 1)

C = (-2, -3)

D = (4, -3)

Process

1.- Calculate the distance from C and D

dCD = \sqrt{(4 + 2)^{2} + (3 - 3)^{2}}

dCD = \sqrt{6^{2}}

dCD = 6

2.- Calculate the distance from A to C

dAC = \sqrt{(2 - 2)^{2} + (-3 - 1)^{2}}

dAC = \sqrt{4^{2}}

dAC = 4

3.- Calculate the perimeter

Perimeter = 2(dCD) + 2(dAC)

-Substitution

Perimeter = 2(6) + 2(4)

-Simplification

Perimeter = 12 + 8

-Result

Perimeter = 20 ft

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