Aresearcher wants to determine if extra homework problems 8th grade students learn algebra. one 8th grade class has extra homework problems and another 8th grade class does not. after 2 weeks, the both classes take an algebra test and the results of the two groups are compared. to be a valid matched pair test, what should the researcher consider in creating the two groups?

mark brainliest

step-by-step explanation:

2 tens + 6 ones

1 ten + 16 ones

0 tens + 26 ones

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

step-by-step explanation:

what are the statements? and what do you mean by "216 2 1 6"?