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GalinKa [24]
3 years ago
15

Follow the directions to solve the system of equations by elimination. 8x + 7y = 39 4x – 14y = –68 Multiply the first equation t

o enable the elimination of the y-term. Add the equations to eliminate the y-terms. Solve the new equation for the x-value. Substitute the x-value back into either original equation to find the y-value. Check the solution.
Mathematics
2 answers:
Helga [31]3 years ago
7 0

Answer:

x=½

y=5

Step-by-step explanation:

(8x+7y=39)2

16x+14y=78

<u>4</u><u>x</u><u>-</u><u>1</u><u>4</u><u>y</u><u>=</u><u>-</u><u>6</u><u>8</u> add the two equations

20x=10.

divide both sides by 20

x=½

8x+7y=39

4+7y=39

7y=39-4

7y=35

y=5

MrMuchimi3 years ago
3 0

Answer:

1/2     5

Step-by-step explanation:

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The correct answer would be 42.50

Work:

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3 years ago
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Arte-miy333 [17]

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A news service conducted a survey of 1026 adults ages 18 years or older in a certain​ country, August 31minus−September ​2, 2015
Musya8 [376]

Answer:

B. To determine the percent of adults in the country who believe the federal government wastes 51 cents or more of every dollar.

Step-by-step explanation:

Given that:

sample size = 1026

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The purpose of this question is to determine the research objective:

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7 0
3 years ago
Gwen studies for 1.5 hours every night. What is the total number of hours Gwen studies for 5 nights
Darina [25.2K]
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hope this helps
~L
6 0
3 years ago
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melomori [17]
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