Find the LCM (least common multiple) of the denominators, and use that as the denominator for the two fractions.
Ex.

LCM (3, 4) is 12

=
1/4 divided by 7/1 equals 1/28
Answer:
30 students are in the science class and 3 students recieved a failing grade.
Answer:
It is A
Step-by-step explanation:
I cant explain step by step I am in a rush but it is A
x+y=10
x+2y=14
x is common in both so u have to subtract the second one from 1st
x-x + y-2y = 10-14
-y = -4
y=4
which means bottle of water (y) = 4
and then substitute 4 in equation (x+y=10 or x+2y=10)
x + 4 = 10
x=6