Zak has 3/5 pack of pencils. Of these, 2/7 are blue. How many blue pencils does Zak have?

11/35

Step-by-step explanation:

First, you would have to make a common denominator. To do this, multiply these 2 denominator, 5 and 7. You should get 35. Then, you would have to make the numerator equal to the denominator. In this case, multiply 3 to 7 and 2 to 5. Now you have 21/35 and 10/35. Now subtract 21 from 10, and simplify if needed. I hope this helps!

the first one, all those points on the line just make a strait line.

54/3 is 18 so 18 is your answer