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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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Answer:

Please check the explanation.

Step-by-step explanation:

a)  How much will you have at the middle of the first year?

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Using the formula

A\:=\:P\left(1+\frac{r}{n}\right)^{nt}

substituting the values

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Therefore, the total amount accrued, principal plus interest,  from compound interest on an original principal of  $ 300.00 at a rate of 6% per year  compounded 2 times per year  over 0.5 years is $ 309.00.

Part b) How much at the end of one year?

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Annual rate r = 6% = 0.06 per year

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Using the formula

A\:=\:P\left(1+\frac{r}{n}\right)^{nt}

so substituting the values

A\:=\:300\left(1+\frac{0.06}{2}\right)^{\left(2\right)\left(1\right)}

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Therefore, the total amount accrued, principal plus interest,  from compound interest on an original principal of  $ 300.00 at a rate of 6% per year  compounded 2 times per year  over 1 year is $ 318.27.

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3 years ago
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Step-by-step explanation:

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r represents the interest rate.

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From the information given,

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