You pick a marble from a bag containing three black, four striped, and three white. What is the probability you will choose either a black or white marble?

3/5

Step-by-step explanation:

3(black marbles)+4(striped marbles)+3(white marbles)=10 marbles

3(black marbles)+3(white marbles)=6 marbles

The probability that the marble will either be black or white is 6/10 or 3/5

each side has a different length.  

step-by-step explanation:

the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.