SurpriseMe

To find probability, 

(# of students who play football and cricket) / (total # of students) = 10/52 = 5/26 = 0.192

1. 50 m : 30 m

First, we can tell that both these numbers have the same unit (m), so we don't need to convert anything.

Second, both these numbers are divisible by 10.  50m/10 : 30m/10  =  5m : 3m

5m : 3m is the simplest ratio.

2. 6 ft to 6 yds  (can be written as 6ft : 6yd)

First, we need to convert ft to yds in order to have the same unit. We know that 3ft = 1yd, so divide 6 by 3 and you get 2yds. 

Now the ratio is 2yd : 6yd.

Second, both these numbers are divisible by 2.  2yd/2 : 6yd/2  =  1yd : 3yd

3. 120 ft / 13.36 cm  (can be written as 120ft : 13.36cm

First, we realize we need to convert to make the units the same. There are 30.48 cm in 1 ft. 30.48 cm x 120 = 3657.6cm

Now the ratio is 3657.6cm : 13.36cm

Thank you for your long response! I do actually know how to do the problem, I just didn't understand what that symbol meant in relation to the question. Thanks though.

3.85 million can be written as 3,850,000.

So punch in 3850000/163696 on your calculator and you get 23.519...

Or you do long division and get 23 with a remainder of 84992. 

Hope this helps!

If there are 30 problems and you solve 2 each minute, and 30/2 = 15, then it takes 15 minutes to finish the math homework!

First we add the numbers: 10,157 + 9987 = 20,144

To round, you take the hundreds number (in this case 1) and if it's 1,2,3,or 4, you round down, making the number just 20,000. If the hundreds number is 5,6,7,8, or 9, you round up, making the number 21,000. In this case, since the hundreds number is 1, we round down to 20,000.

Hope this helps!

The equation should be f - 7.5x

when f = fund and x = trips

When we substitute in the known values for f and x, the problem looks like this: 240 - 7.5(12)

First multiply: 7.5*12 = 90

Then subtract: 240 - 90 = 150

After 12 trips to the laundry, the student will have $150 left in his fund.

The u terms can be combined with the u terms and the v terms can be combined with the v terms

Like this: 3u + 4u = 7u, and 7v - 2v = 5v

So the answer is 7u + 5v

Don't for get to only add like terms. Like terms have the same variable. The variable is the u or the v in this case.