Question

http://prntscr.com/5fbzhk

Answer 1

@SolomonZelman @sleepyjess

Answer 2

@ganeshie8

Answer 3

@Joel_the_boss

Answer 4

@Michele_Laino

Answer 5

a and b

Answer 6

?

Answer 7

@sleepyjess

Answer 8

please you have to calculate the most common multiple among (3, 5, 9, 18), in order to make all of your fraction with the same denominator

Answer 9

please, @Rainbow_dashie what is the minimum common multiple among (3, 5, 9, 18)?
sorry befor I have made an error not most common... but minimum common multiple

Answer 10

how do i work that out?

Answer 11

please note that:
3=3*1;
5=5*1
9=3^2*1
18=3^2*2
now you have to pick all common and uncommon factors with the highest exponent

Answer 12

so, what factors do you pick?

Answer 13

please try

Answer 14

I don't get it!!

Answer 15

ok! I write m.c.m=3^2*5*2=90
do you agree?

Answer 16

forget that 1 hold on

Answer 17

http://prntscr.com/5fcbef

Answer 18

so we can write:
\[-\frac{ 2 }{ 3 }=-\frac{ 60 }{ 90 }\]
\[-\frac{ 2 }{ 5 }=-\frac{ 36 }{ 90 }\]
please do the same with remaining fractions

Answer 19

What??

Answer 20

sorry i dont understand

Answer 21

sorry I have mede an error, we have to find m.c.m among (3,5,9,12,18= which is equals to 180, so we have:
\[-\frac{ 2 }{ 3 }=-\frac{ 120 }{ 180 }, -\frac{ 2 }{ 5 }=-\frac{ 72 }{ 180 }\]
\[-\frac{ 5 }{ 9 }=-\frac{ 100 }{ 180 },-\frac{ 13 }{ 18 }=-\frac{ 130 }{ 180 }\]
and
\[-\frac{ 7 }{ 12 }=-\frac{ 105 }{ 180 }\]

Answer 22

so your answer is -72/180=-2/5, so B, namely the second option

Answer 23

it was wrong

Answer 24

@Michele_Laino

Answer 25

and also -100/180=-5/9, so C. Reassuming your answer are B and C

Answer 26

it was a

Answer 27

@Rainbow_dashie

Answer 28

IT WAS A!!!!!

Answer 29

please, note that you have to pick two correct answers

Answer 30

Sorry, I'm talking about your first question, please

Answer 31

the right answer to your second question is A, you are right!

Answer 32

You made me get a bad score!!

Answer 33

because you have to solve this calculus:
\[2-\frac{ 3 }{ 4 }*2=2-\frac{ 3 }{ 2 }=\frac{ 1 }{ 2 }=2*\frac{ 1 }{ 4 }\]

Answer 34

@Rainbow_dashie