# math c30

posted by .

-pi/4 plus 15pi/4 divided by 2=7pi/4

how is the math done regarding the fractions (dividing and multiplying)

• math c30 -

i will use n to represent pi because it is much easier to read

(-n/4+15n/4)/2 = 7n/4
((-n+15n)/4)/2 = 7n/4
(14n/4)/2 = 7n/4

since dividing by 2 is the same as multiplying by 1/2, the 14n/4 becomes 14n/8 which equals 7n/4.

## Similar Questions

1. ### division of fractions

Division of fractions is sometimes said to be multiplication of inverses. Elaborate with an explanation and example. If you have a/b divided by c/d this is the same as a/b * d/c If e.g., we have 2/3 divided by 7/9 then we have 2/3 …
2. ### Math

How do you divide fractions??? Cross multiply: For example, 4/5 divided by 6/7 would be 28/30 or 14/15. 3/4 divided by 2/3 would be 9/8 or 1 and 1/8 Actually, the word cross multiply is a misnomer. What is being done is multiplying
3. ### Math

What is the rule for multiplying or dividing fractions?
4. ### Math

Well in school we were reviewing percents, and one of the main things being discussed was how to convert between fractions, decimals, and percents. However I didn't understand how she explained converting fractions to decimals. She …

This is fractions. Not dividing problems. (Ex: 3/5 is a fraction) 5c = 2/3 (divided by) 2/3
6. ### math

Multiplying and Dividing Rational Expressions: 2) x^2-8x+7/x^2+6x-7 = (x-7)/(x+7) 3) x^2-5x+6/x+4 times 3x+12/x-2 =3(x-3) 4)2x-3/5x+1 divided by 6x^2-13x+6/15x^2-7x-2=1 5) x^3-9x/x^2+11x+24 times x^2+7x-8/x^2-4x+3= x(x-3)(x-1)/(x+3)(x+8) …
7. ### math

Multiplying and Dividing Rational Expressions: 2) x^2-8x+7/x^2+6x-7 = (x-7)/(x+7) 3) x^2-5x+6/x+4 times 3x+12/x-2 =3(x-3) 4)2x-3/5x+1 divided by 6x^2-13x+6/15x^2-7x-2=1 5) x^3-9x/x^2+11x+24 times x^2+7x-8/x^2-4x+3= x(x-3)(x-1)/(x+3)(x+8) …
8. ### Math

Check all that apply5/3 is the reference angle for: 2pi/3 15pi/3 7pi/3 19pi/3
9. ### 5th grade math (dividing fractions)

Hi.. I need help figuring out this problem, sovling for x: 3 divided by x/9 = 5 and 2/5 I was able to solve: x divided by 3/4 = 6 by multiplying 6 x 3/4 = 4 1/2. Just not sure how to solve the first problem. If I change 5 2/5 into …
10. ### Mathematics.

6 and 2/7 divided by 2 and 3/4. I'm very bad at dividing fractions. I just got into this subject of dividing fractions and I'm really bad at it. If you could explain how to divide this expression, that'd be great. Thanks :).

More Similar Questions

Post a New Question