Alex had a bag of marbles. 1/4 of them were red and 2/7 of thenm were green. what fraction of his marbles were red or green?

15/28

Step-by-step explanation:

1/4 goes to 7/28

2/7 goes to 8/28

Add them to get : 15/28

plz yuo

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.