You pick a card at random. 1,2,3,4,5,6,7

What is P(not 6)?
Write your answer as a fraction or whole number.

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28

If the discriminant if a quadratic equation is 4 which statement describes the roots?

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?