Evaluate the following expression using the values given:
find -3a2 - b3 + 3c2 - 2b3 if a = 2, b = -1, and c = 3.

What are correct trigonometric ratios that could be used to determine the length of ln

Factor and solve to find roots x squared -x - 90 =0

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.