Yumi takes 5/12 of an hour to complete 50 math problems eric is able to complete 48 math problems in 2/5 an hour which students can complete math problems greater rate of problems per hour

Yumi will complete math problems at rate of 120 problems per hour.

Step-by-step explanation:

Yumi takes 5/12 of an hour to complete 50 problems.

Let us find how much time Yumi will take to solve 1 problem.

We can see that Yumi completes one problem in half minute, therefore, Yumi will complete 120 problems in an hour.

Eric takes 4/5 of an hour to complete 48 problems.

Let us find how much time Eric will take to solve 1 problem.

Eric takes one minute to solve one problem, therefore, he will solve 60 problems in an hour.

Therefore, Yumi will complete math problems at 2 times greater rate than Eric.

connie < felicia < stew

step-by-step explanation:

stew:

we need to find the slope

m = (y2-y1)/ (x2-x1)

    = (2650-795)/(10-3)

    = 1855/7

265 words per minute

connie:

we need to find the slope

m = (y2-y1)/ (x2-x1)

we have two points (0,0) and (4,800)

m = (800-0)/(4-0)

  m = 800/4

    200 words per minute

felicia:

260 words per minute

200< 260 < 265

connie < felicia < stew

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80