Which of the following statements is always true for all values of a a) -a = a b) |a| = -a c) |a| = a d) ) = a

If the slope of one line equals the slope of another line then ? a) the two lines are intersecting lines b) the two lines are perpendicular lines c) the two lines are parallel lines d) the two lines always have very steep slopes

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

For each proportion find the unknown number x 1/5/8=×/15