Math homework help? [:?

Question

express each ratio in simplest form.

8cm to 2m.

2m/7m

complete each statement.

if x/7 = c/9 then x/c = ?

if 5:x = 9:3 then 9x = ?

if a/8 = b/12 then a+8/8 = ?

if x/5 = 3/4 then x+3/9 = ?

find the value of x.

7/2 = 3x/5, x = ?

im a freshman and i just started advanced geomety, so any help would be apprieciated even just an explanation.

:]

thanks in advance...

Answer 1

i took geometry last year and some of it confused me too. I got my A though haha.

1. x/c = 7/9

all that these problems are is cross multiplying. multiply the numerator of fraction 1 by the denominator of fraction 2. And the other way around. That gets you your ratio.