When point b (5, -1) is rotated 180º about the origin, its coordinate becomes (-5, 1). true false

What number must you add to complete the square x^2+12x=16

Write 17/20 as a decimal and as a percent.

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?