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RSB [31]
3 years ago
6

Solve the system using elimination 6x-3y=15 and 7x+4y=10

Mathematics
1 answer:
Oxana [17]3 years ago
8 0
6x - 3y = 15.....multiply by 4
7x + 4y = 10....multiply by 3
---------------
24x - 12y = 60 (result of multiplying by 4)
21x + 12y = 30 (result of multiplying by 3)
---------------add
45x = 90
x = 90/45
x = 2

6x - 3y = 15
6(2) - 3y = 15
12 - 3y = 15
-3y = 15 - 12
-3y = 3
y = -3/3
y = -1

solution is (2,-1) <==
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3 years ago
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maksim [4K]

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Step-By-Step  explanation:

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36+158+59=\$253

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\frac{36}{253}\times 100=14.2\%

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6 0
3 years ago
A worker earns $5.15/h receives a raise. She now earns $6/h. Find the percent of increase in her hourly rate of pay.
Svetllana [295]

Answer:

The percentage increase in worker wages in hourly rate of pay is 16.5%

Step-by-step explanation:

Given as :

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Let The percentage increase in her hourly rate of pay = x %

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or, x = 0.165 × 100

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Hence The percentage increase in worker wages in hourly rate of pay is 16.5% Answer

5 0
3 years ago
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