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3 years ago

If a box of 100 pencils cost $4.75, what should you expect to pay for 225 pencils?

Mathematics

2 answers:

skad [1K]3 years ago

6 0

Answer:

$ 10.69

Step-by-step explanation:

225 is 2.25 times the 100 pencils. ( 225/100) So all you have to do is multiply 2.25 the price ($4.75) and you get 10.6875, money can only go to the tenth place so you round it to $10.69

<em>Hope this helped and pls mark as brainliest!</em>

<em />

<em>~Luna</em>

kvv77 [185]3 years ago

3 0

$11.25 because the unit price is 0.05, so you would multiply that by 225 to get the answer, $11.25

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Two pipes running together can fill a tank in 20 minutes.

Hunter-Best [27]

Answer:

45, 36

Step-by-step explanation:

let x y minutes be the time for pipes to fill the tank, let n be the water needed to fill the tank.

x-y=9

(n/x)*20+(n/y)*20=n

n is removed by dividing the 2nd equation by n

here u get:

(1/x+1/y)*20=1

you sub x=9+y into the above equation

1/y+1/(9+y)=1/20

((9+y)+(y))*20=(9+y)(y)

180+40y=9y+y2

y2-31y-180=0

then use the quadratic formula and u will find y=36 or -5

-5 is rejected because it is negative

x=36+9=45

therefore it is 36 mins and 45 mins

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3 years ago

Lan scores 5 out of 60 mark test.what is his score as a percentage to 1 decimal place

artcher [175]

Answer:

.1 approx.

Step-by-step explanation:

5/60 and x/100%

Cross multiplying...

5 x 100% = 5

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( I dunno if I am right, so please check first.)

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3 years ago

the utilities bill for the Miller's' house in April was $132. forty two percent of the bill was for gas, and the rest was for el

Lynna [10]

Hey You!

132*42% = 55.44

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So, the Millers paid $55.44 for gas and $76.56 for electricity.

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3 years ago

Read 2 more answers

Consider a nuclear power plant that produces 1200 MW of power and has a conversion efficiency of 34 percent (that is, for each u

Pachacha [2.7K]

Answer:

Fuel used = 111,303,473,760 MJ/year

Step-by-step explanation:

Power production = Fuel energy * Efficiency

1200 MW = Fuel energy * 0.34

Fuel energy = 1200 MW / 0.34 =3529.41 MW

This means it consumes 3529.41 MJ/s.

Per year, it operates 365 days, 24 hours a day, 3600 seconds an hour.

To calculate the fuel used annualy we have to multiplicate by all these factors

Fuel used = 3529.41 MJ/s * 3600 s/hour * 24 hours/day * 365 days/year

Fuel used = 111,303,473,760 MJ/year

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3 years ago

What is the measure of arc WZY?

Radda [10]

Answer:

Step-by-step explanation:

Look at the picture.

m∠WOY = 2(m∠WZY)

We have m∠WZY = 69°. Therefore m∠WOY = 2(69°) = 138°.

m arc WZY = 360° - 138° = 222°

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3 years ago