select all the pairs of ratios that form a proportion pick two

1/6, 4/20
7/9, 28/36
14/18, 21/27
30, 6/18

2. which pair of ratios does not form a proportion pick one

3/5, 24/40
30/10, 15/5
9/14, 3/4
7/12, 14/24

3.two shirts cost 12.50 how much will it cost to buy five of the shirts

6.25
31.25
25.00 this one
30.00

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

What properties allow transformation to be used as a problem solving tool

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .