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Eddi Din [679]
3 years ago
11

Sarah solved this system of equations. 4x + 2y = –14 –10x - 7y = –25 Step 1: 40x + 20y = –140    –40x - 28y = 100 Step 2: –8y =

–40 Step 3: y = 5 Step 4: 4x + 2(5) = –14 Step 5: x = –6 Step 6: Solution: (–6, 5) Did Sara find the correct solution to the system of equations? Explain. Yes, Sara found the correct solution. No, in step 1 she multiplied the right side of the second equation by –4 instead of by 4. No, in step 4, she substituted the value of y back into the wrong equation to solve for x. No, in step 6, she switched the order of the solution. It should be (5, –6).
Mathematics
2 answers:
Serga [27]3 years ago
8 0

Answer:

A) Yes, Sara found the correct solution.

B) No, in step 1 she multiplied the right side of the second equation by –4 instead of by 4.

C)No, in step 4, she substituted the value of y back into the wrong equation to solve for x.

D)No, in step 6, she switched the order of the solution. It should be (5, –6).

Answer = B) No, in step 1 she multiplied the right side of the second equation by –4 instead of by 4.

Step-by-step explanation:

I just did the assignment.

zavuch27 [327]3 years ago
5 0

Answer:

The answer is B "No, in step 1 she multiplied the right side of the second equation by -4 instead of by 4"

Step-by-step explanation:

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2. How many square yards of carpet will be needed for a 21 ft by 15 ft room?
ipn [44]

Answer:

The answer to your question is: 35 yd²

Step-by-step explanation:

To solve this problem, just find the data, the formula, substitute the values in the formula and find the result.

Data

Square yards = ?

Length = 21 ft

Width = 15 ft

Formula

Area of a rectangle = length x width

Substitution

Area of a rectangle = 21 ft x 15 ft

Area of a rectangle = 315 ft²

Area of a rectangle = square yards of carpet

Finally, convert ft² to yd²

315 ft² = 35 yd²

Result

Square yards of carpet = 35 yt²

7 0
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Step-by-step explanation:

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4 0
2 years ago
Simplify: 4 square root of 2 plus square root of 32 minus square root of 16
VMariaS [17]
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5 0
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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8 0
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