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Rasek [7]
3 years ago
11

Solve the system of linear equations using the elimination method x=3y;3x-2y=14

Mathematics
1 answer:
vladimir1956 [14]3 years ago
7 0

Answer:

<h2>x = 6 and y = 2 → (6, 2)</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}x=3y&\text{subtract}\ 3y\ \text{from both sides}\\3x-2y=14\end{array}\right\\\\\left\{\begin{array}{ccc}x-3y=0&\text{multiply both sides by (-3)}\\3x-2y=14\end{array}\right\\\underline{+\left\{\begin{array}{ccc}-3x+9y=0\\3x-2y=14\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad7y=14\qquad\text{divide both sides by 7}\\.\qquad\qquad y=2\\\\\text{put the value of y to the first equation:}\\x=3(2)=6

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How much material will Dmitri's mom need for the tent, including the floor?
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<h3>Answer:  21.4 square meters</h3>

Work Shown:

A = area of the front triangular face

A = base*height/2

A = 2*1.7/2

A = 1.7

L = lateral area

L = (perimeter of the base)*(depth)

L = (2+2+2)*(3)

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7 0
2 years ago
Read 2 more answers
Rita is spending more time at home to study and practice math. Her efforts are finally paying off. On her first assessment she s
Kipish [7]

Answer:

7th

Step-by-step explanation:

63 - 58 = 5

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She is adding 5 points each time

a1 = 58

d = 5

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a4 = 58+5 = 73

a5 = 73+5 = 78

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4 0
2 years ago
If q/18 = 5 what does q = to
qaws [65]

Answer:

Q= 90

Step-by-step explanation:

To do this problem you need to get q by itself and to do that you would move the 18 over

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2 years ago
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A laptop has a listed price of $843.88 before tax if the sales tax rate is 7.25% find the total cost of the laptop with sales ta
Step2247 [10]

Answer:

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Step-by-step explanation:

Given the following question:

7.25% of 843.88

In order to find the answer, we use the formula to calculate percentages, then we add that answer to the initial cost of the laptop.

\frac{p\times c}{100}
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1 < 5
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<u>Now add:
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Which means the laptop after a 7.25% sales tax costs "$905.06 dollars."

Hope this helps.

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2 years ago
Which of the following explains the relationship between angles c and d
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Where’s the picture, if you had a picture i could help you :)
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