Kong took 15% fewer seconds that nolan took to complete his multiplication timed test. kong took 85 seconds.

how many seconds did nolan take?

Solve the system of equations. y= 2x y= x^2 - 15

Find the equation of the trend line (line of best fit). show your work i'm using the points (34,76) (42,91)

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?