Which expression is equivalent to : 8.5p + 3.6q - (9.8q - 2.1p)

A.10.6p - 6.2q
B.6.4q - 6.2q
C.1.3p - 1.5q
D.1.3p + 5.7q

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

The value of cos 30° is the same as which of the following?

The bottom of ignacio's desktop is 74.5cm from the floor. ignacio's 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