Question

ADD?

Answer 1

\[\frac{ 7 }{ 3a } + \frac{ 2 }{ 5}\]

Answer 2

you want to find the common denominator first

Answer 3

@nikato the common denominator of what?

Answer 4

so one of the denomintaor is 3a and the other is 5.
what is their least common multiple

Answer 5

@nikato 15?

Answer 6

close. its actually 15a

Answer 7

@nikato okay I'm so confused :/ so first you find the least common multiple of the denominators, correct?

Answer 8

yes. and in this case 15a. you must make the fractions have a common denominator before you can add them

Answer 9

so you have 7/3a.
what would you multiply this by so you have the denomintor 15a

Answer 10

you multiply 7*5 so it would be 35/15a

Answer 11

@nikato you multiply 7*5 so it would be 35/15a

Answer 12

@nikato are you there?

Answer 13

yes. thats correct. and sorry, this site lags sometimes so i have to keep refreshing

so now do the same for the other fraction 2/5 so that the denomintaor is also 15a

Answer 14

@nikato it's okay:) and okay so i got 35/15a and 6/15a

Answer 15

@nikato so you just add the numerators and end up with 41/15a

Answer 16

its actually 6a/15a

now add them together

Answer 17

@nikato wait why did 6 suddenly become 6a? 2 didn't have an a after it?

Answer 18

you should have multiplied top and bottom by 3a in order for the 5 to be 15a

Answer 19

@nikato okay that explains it.. lol