4.75 x 10^6 * 8.77 x 10^5

Fifty five percent of the students at west side middle school walk to school. What fraction of the students walk to school?

LekaFEV [45]

Answer 11/20

Step-by-step explanation:

55% is the same as 55 out of 100. To make the answer completely right, you need to simply it. To do that, find the greatest common factor. In this case, the GCF is 5. Divide both numbers by 5. You will get 11 out of 20 as an answer.

7 0

4 years ago

A tank's length is 3 feet longer than its width. The height is 1 foot less than the width. The volume of the tank is 160 cubic f

Ivanshal [37]

Answer:

The width of the tank is 5 feet.

Step-by-step explanation:

Given:

A tank's length is 3 feet longer than its width.

The height is 1 foot less than the width.

The volume of the tank is 160 cubic feet.

Now, to find the width of the tank.

Let the width of the tank be $x.$

So, length is $x+3.$

And, height is $x-1.$

The volume of tank = 160 cubic feet.

Now, to get the width we put formula:

Volume = length × width × height.

$160=(x+3)\times x\times (x-1)$

$160 =x(x^2-x+3x-3)$

$160=x(x^2+2x-3)$

$160=x^3+2x^2-3x$

Subtracting both sides by 160 we get:

$0=x^3+2x^2-3x-160$

$x^3+2x^2-3x-160=0$

Now, on solving the equation we get:

$x=5.$

The width = 5 feet.

Therefore, the width of the tank is 5 feet.

5 0

4 years ago

What is the answer? A? B? C? D?

katrin [286]

Answer:B or C

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Allison practices her violin for at least 12 hours per week. She [practices for three fourths of an hour each session. If Alliso

Nikolay [14]

Well let’s see...

If she practices 3/4 of an hour a week we need to find out how much time is 3/4 of an hour. To do this we divide 60/4 and get 15. We check by multiplying 15 x 4 and get 60 so we know we are correct.

Now we know that 1/4 of an hour is 15 minutes, but we need to know how long she practices per session. Because 15 is 1/4 we multiply 15 x 3 to make it 3/4.

15 x 3 is 45. We check by dividing 45 by 3 and we do get 15 so we are correct.

If 3/4 of an hour is 45 minutes and she practices for 3/4 of an hour then we know that for every session she practices for 45 minutes.

The question states that she practices for 3 hours every week, since we know that we need to multiply 45 (because she practices 45 minutes every session) by a number that will get us 3 hours.

45 x 4 is 180 minutes (or three hours) we divided 180 by 4 and got 45 thus we are correct.

Which in turn means she has done 4 sessions this week. Since now we know that 4 sessions is 3 hours (making the ratio 4:3) we can multiply to find how many sessions she has left to do this week.

So if we have 4:3 then we can make it 8:6 (which means we know have 8 sessions and 6 hours) now we can make it 12:9 (12 sessions and 9 hours) and add it once more to get 16:12 (or 16 sessions and 12 hours).

Now we know that it takes 16 sessions for her to reach twelve hours, and since she and already done 4 sessions and 3 hours, it means that she has 12 sessions left to do until she is able to get her 12 hour a week goal.

—
Hope this helped, have a great day! :D

4 0

3 years ago

Read 2 more answers

Can someone please help me???

PolarNik [594]

Answer:

c,d

Step-by-step explanation:

factorise it

x + 4 = 0 ⇒ x1 = −4

x − 2 = 0 ⇒ x2 = 2

4 0

3 years ago