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olchik [2.2K]
3 years ago
7

Which equation shows the substitution method being used to solve the system of linear equations?

Mathematics
2 answers:
svet-max [94.6K]3 years ago
6 0
The equation
(y + 5) + y = 6
shows the substitution method being used to solve the system of linear equations. So the correct option among all the options given in the question is option "D".
For a better explanation, let us first write down the two equations given in the question.
x + 5 = 6
and
x = y + 5
Now the thing that has been done is that the value of x in the first equation has been replaced by the value of x that is given in the second equation. this is actually the substitution method of solving equations.
Papessa [141]3 years ago
3 0
Your answer is D. You're welcome ;-) (Not trying to sound sarcastic, just I wanted to say you're welcome now than never)
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What is the length and the width of a rectangle with perimeter of 48 inches if its length is 7 inches longer than its width.
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Answer:

Length and the width of the rectangle is 15.5 inches and 8.5 inches respectively.

Step-by-step explanation:

Given:

Length = 7 inches + Width

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=> L = (7 + W) inches............. (1)

Perimeter 'P' is the sum of all sides of the rectangle 2 (L + W)

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Substitute for L in equation (2)

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48 = 2[7 + 2W]

48 = 14 +4W

48 - 14 = 4W

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W = 8.5 inches

Recall that: Length, L = (7 + W)

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