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larisa [96]
3 years ago
8

Teri incorrectly solved the system of equations below. Correctly identify the error Teri made. 2x - 10 y = -30 x - 5y = 20 Step

1: x - 5y = 20 x = 5y + 20 Step 2: 2(5y + 20) - 10 y = -30 10y + 40 - 10y = -30 40 = -30
Mathematics
1 answer:
umka21 [38]3 years ago
3 0

Answer:

See explanations below

Step-by-step explanation:

Given the system of equation

2x - 10 y = -30 ... 1

x - 5y = 20 ... 2

Step: From 2;

x = 20 + 5y ...3

Step 2: Substitute equation 3 into 1

2x - 10y = -30

2(5y+20) - 10y = -30

Open the bracket

10y + 40 - 10y = -30

10y - 10y + 40 = -30

0+40 = -30

40 = -30

The steps taken by Teri are correct all through. He didn't make any error whatsoever

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Step-by-step explanation:

i think that's what you're asking

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2 years ago
The right triangle on the right is a scaled copy of the right triangle on the left. Identify the scale factor. Express your answ
bazaltina [42]

Answer:

The images of the question are missing, I found a matching question and image online, and it is in the attachments.

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The scale factor of the triangles from the left to the right is 2

or

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Step-by-step explanation:

From the image, the right triangle on the left has the following dimensions:

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While the right triangle on the right has the following:

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or

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5 0
3 years ago
What is the top price of $45.09 item when 7% sales tax is added
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7 0
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7 0
3 years ago
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