3 years ago

X − 2y = 14 x + 3y = 9 what is the system of equations?

Mathematics

2 answers:

pishuonlain [190]3 years ago

6 0

answer

(12, -1)

hope this helps :)

GaryK [48]3 years ago

6 0

Answer:

(12,-1)

I got it right on my test

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a plumber laying 500 meters of drain pipe required 20 men of working for 10 days . What length in meters would be laid by 50 men

belka [17]

Answer:

500 meters =20men =10days

To get the factor 500/(20*10)= 5/2 meters/day

For 50 men and 5days we don't know the meters

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3 years ago

When the sum of a number and 3 is subtracted from 10 the result is 5. What is the integer

Rashid [163]

In algebraic terms this is:

$10-(x+3)=5\\10-x-3=5\\10-x=5+3\\10-x=8\\-x=8-10\\-x=-2\\x=2$

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3 years ago

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Viktor [21]

Answer:

0.1151

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Given that a laptop company claims up to 10.1 hours of wireless web usage for its newest laptop battery life. However, reviews on this laptop shows many complaints about low battery life. A survey on battery life reported by customers shows that it follows a normal distribution with mean 9.5 hours and standard deviation 30 minutes.

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(we convert into one unit for calculations purpose here hours)

a) the probability that the battery life is at least 10.1 hours

= $P(X\geq 10.1)\\=P(Z\geq \frac{10.1-9.5}{0.5} )\\= P(Z\geq 1.2)\\=0.1151$