Rachael’s backyard swimming pool is being emptied by a pump. The amount of water in the pool W in gallons at any time t in hours is given by the following equation: W = 9,000 – 250t. How many gallons of water are being pumped out each hour?

Answers

Answer 1

Answer: ok so it is
W=origianl amount-amount taken out
amount taken out=amount taken out per hour times number of hours (t)
theref

250 gallons aer being pumped out every hour

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The square abcd has side length 10cm. E is the midpoint of BC. Work out the length of DE. Answer to 1 decimal place.

Answers

-- DEC is a right triangle.

-- DC is one side of the square = 10 cm
-- EC is half the side of the square = 5 cm
-- DE is the hypotenuse = square root of (5² + 10²) = √(125 cm²) .

-- Truncated to one decimal place, that's 11.1 cm.

-- Rounded to one decimal place, it's 11.2 cm.

Think of it as a triangle. E is the midpoint of BC, so EC is 5cm. Then CD is 10cm. Pythagoras it, so 5^2 + 10^2 = DE^2. Rt(125) = 11.2 to 1 decimal place. That's the answer

In the school chorus, 2/12 of the students are fourth graders. In simplest form, what fraction of the students in the school chorus are fourth graders?

Answers

1/6 students in the school chorus are in fourth grade

2/12 simplified is 1/6. Because 2 goes into 2 once, and into 12 six times.

#8 Dylan, Mike and Jeremy had $171. Mike had twice as much money as Dylan. Jeremy had three times as much money as Mike. How much money did Jeremy have?#9 we skipped this one

#10. Maddy had twice as many stamps as Simon. After Maddy sold 60 stamps, Sinom had twice as many stamps as Maddy. How many more stamps did Maddy have than Simon in the beginning?

Answers

Answer:

8. $114

10. 60 stamps

Step-by-step explanation:

Let Dylan have d, Mike have m, and Jeremy have j

3 of them have 171, so we can write:

1. $d + m + j = 171$

Mike has twice as Dylan, so we can write:

2. m = 2d

Jeremy had three times as Mike, so:

3. j = 3m

We can write equation 3 as m = j/3

Also, if we put this into equation 2, we have:

j/3=2d

d=j/6

Now we have d and m in terms of j. We put it into equation 1 and solve for j:

$(j)/(6) + (j)/(3) + j = 171\n(3j+6j+18j)/(18)=171\n(27j)/(18)=171\n27j=18*171\n27j=3078\nj=(3078)/(27)\nj=114$

Jaime has $114

10.

amount of stamps Maddy has is m and amount Simon has is s

Maddy had twice as many stamps as Simon:

m = 2s

Also

After Maddy sold 60 stamps, Sinom had twice as many stamps as Maddy:

s+60=2(m-60)

We put the first equation in the second and solve for s:

s+60=2(m-60)

s+60=2(2s-60)

s+60=4s-120

180=3s

s=60

THus, m = 2(60) = 120

So maddy had 120 - 60 = 60 more stamps than Simon

Tell whether the angles are complementary or supplementary. Then find the value of x.

Answers

Complementary. As complementary angles for a right angle when they are added together.

A boat travels 3,600 in 12 minutes.what is the boat speed

Answers

Divide each by 12 to get its speed for one minute. 3,600/12=300 12/12=1. It is going 300?? in 1 minute. Hope this helped!

Lauryn has128 marbles. kristin has 118 marble. who has more marbles?

Answers

Lauryn has more marbles because 128 is greater than 118

Lauryn does. Just look at the numbers

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