Answer:
Isolating a variable means rearranging an algebraic equation so that a different variable is on its own. The goal is to choose a sequence of operations that will leave the variable of interest on one side and put all other terms on the other side of the equal sign.
Step-by-step explanation:
Distribute.
n(n+3)
Answer : n^2+3n
Answer:
6
Step-by-step explanation:
Find the predicted y value when x=1:

Find the residual:

Because our residual is positive, this is an indicator that our predicted y value is too low.