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3 years ago

What is x-2y=1, solve for y

Mathematics

1 answer:

GREYUIT [131]3 years ago

6 0

The answer is X=1+2y

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3 miles in .25 of an hour. how many miles per hour does the train go

kotykmax [81]

Multiply 3 by 4, which gets you 12 mph

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3 years ago

Working together to palms can drain a certain pool in three hours if it takes the older pump nine hours to drain the pool by its

andreyandreev [35.5K]

Answer:

It would take the newer pump 4.5 hours to drain the pool

Step-by-step explanation:

Let's investigate first what is the fraction of the job done in the unit of time (hour in this case) by each pump if the work individually:

older pump: if it takes it 9 hours to complete the job, it does $\frac{1}{9}$ of the job in one hour.

newer pump: we don't know how long it takes (this is our unknown) so we call it "x hours". Therefore, in the unit of time (in one hour) it would have completed $\frac{1}{x}$ of the total job.

both pumps together: since it takes both 3 hours to complete the job, in one hour they do $\frac{1}{3}$ of the job.

Now, we can write the following equation about fractions of the job done:

<em>The fraction of the job done by the older pump plus the fraction of the job done by the newer pump in one hour should total the fraction of the job done when they work together.</em> That is in mathematical terms:

$\frac{1}{9} +\frac{1}{x} =\frac{1}{3}$

and solving for x:

$\frac{1}{9} +\frac{1}{x} =\frac{1}{3} \\x+9=3x\\2x=9\\x=\frac{9}{2} \,\,hours\\x = 4.5\,\,hours$

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3 years ago

Dalton is going on a backpacking trip with his family. They need to hike to their favorite camping spot and set up the camp befo

vagabundo [1.1K]

4pm because it takes them 3 hours to get set and sunset is at 7pm so 7-3=4pm boom!

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3 years ago

A store advertises a 20% markdown on a dishwasher that normally sells for $952 find the sale price

CaHeK987 [17]

Answer:

762.08.

Step-by-step explanation:

952.60x0.20=190.52

952.60-190.52=762.08

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3 years ago

Read 2 more answers

If the person borrowed $3000 for 3 years at a rate of 2%, how much interest will they owe for the loan

krek1111 [17]

In this case were going to solve the question using "simple interst", so since were looking for the interest it will be I= PxRxT (I stands for "interest", P stands for "principal", R stands for "rate" and T stands for "time")

so P is $3000

R is 2%

and T is 3 years

so we'll have to turn our rate into a decimal which is 2% = .02

now to start the problem:

I= (3000)(.02)(3) (means 3000 x .02 x 3)

I= $180 is your answer

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3 years ago