D
this is because there are 27 total students and 3 groups. let x represent the number of students per group. the equation would be 3(x)=27
if u need to solve for x, it would be x =9
7y + 10x = 99
y - x = 2
y = 7 , x = 5
to get the inverse of any expression, we start off by doing a quick switcheroo on the variables and then solve for "y".

Answer:1331cm
Step-by-step explanation:vol=lbh
11*11*11cm=1331cm
Answer:
Step-by-step explanation:
To analyse a graph you are meant to determine a general trend, relating the results of an experiment to the hypothesis as well as to form. For example you look at all the values in a line graph and you are yo predict one you are to find its common increase or decrease.
If all possible vertical lines will only cross the relation in one place, then the relation is a function.This works because if a vertical line crosses a relation in more than one place it means that there must be two y values corresponding to one x value in that relation.