What is the average of 39,42,and 45

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

Ricardo ran the 400 meter race 3 times his fastest time was 54.3 seconds his slowest time was 56.1 seconds if his average time was 55.0 seconds what was his time for the third race

Which expression is not a polynomial?