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soldier1979 [14.2K]
3 years ago
15

Ryan, Sasha, Connie, and Lawrence completed the following proof. Who completed the proof incorrectly?

Mathematics
2 answers:
Sedbober [7]3 years ago
6 0
Sasha was incorrect because she divided but said she had subtracted
marissa [1.9K]3 years ago
5 0
<h2>Answer:</h2>

The person who completed the proof incorrectly is:

                 Option: B

                   B)  Sasha

<h2>Answer with explanation:</h2>

Sasha was incorrect with her proof.

She followed as follows:

  • 3x+7=5x-11      Given
  • 7=2x-11

( She subtracted 3x from both the sides of the equation)

Hence, the property is subtraction property of equality.

  • 18=2x

She added 11 on both the sides of the equation.

Hence, the property is addition property of equality.

  • x=9

<em>she divided both side of the equation by 2.</em>

<em>Hence, the property is division property of equality but she called it as a subtraction property of equality.</em>

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Answer

W=7

Explanation:

The formula for the perimeter for a rectangle is P = 2L + 2W

The formula for the area of a rectangle is A = LW

where L = length and W = width

P = 22 and A = 28

22 = 2L + 2W

28 = LW

Rewriting the 2nd equation L = 28/W

Substituting this into the first equation

22=2(28/W) + 2W

Reworking the equation to eliminate the denominator

22W = 2(28) + 2W2

22W = 56 + 2W2

and

2W2 - 22W + 56 = 0

Dividing by 2

W2 - 11W + 28 = 0

(W-7)(W-4)

Set each factor equal to 0 and solve each for 0

W = 4, W = 7

then W = 4

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Step-by-step explanation:


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zloy xaker [14]

Answer: formula - (x/4)+x

Step-by-step explanation:

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(x/4)+x

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and heres another example using 50

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