What's n = 3 x 45 for 5th grade math cause i'm not sure how this math goes

How far is x from 5 on a number line?

Question 101 points)which equation in slope-intercept form represents the line that passes through (5, 1) and(-4,7)

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²