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deff fn [24]
3 years ago
10

2 x – 5y = –47 6 x – 5y = –71

Mathematics
1 answer:
devlian [24]3 years ago
7 0

Answer: x = - 6

y = 7

Step-by-step explanation:

Let 2x -5y = -47 be eq. 1

And 6x -5y = -71 be eq. 2

By substrate of 1 - 2:

2x-5y-6x+5y = -47+71

so -4x=24 and x= -6

Substitute x in any eq.

2(-6) - 5y = -47

-5y = -47 +12

-5y = -35 so y= 7

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14 h. 30min - 15h. 30

Step-by-step explanation:

Becuase the time varies by 15 minutes each, just find the difference after  adding and subtracting and then add the nap and sleep time.

4 0
3 years ago
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3 years ago
an SUV sold for 4,000 when Mark bought it. when Sarah bought it later, it was 3,000. what is the percent of the change from mark
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6 0
3 years ago
Explain why a change from 20 to 40 is a 100% increase, but a change from 40 to 20 is a 50% decrease. Increasing 20 to 40 is the
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Answer:

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4 0
2 years ago
Please help me, GodBless.
Fed [463]

Answer:

m= 5/2

Step-by-step explanation:

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3 0
3 years ago
Read 2 more answers
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