What criteria can be used to prove these two triangles congruent?
a. aas
b. asa
c. hl
d. ssa

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

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?

Tom drove 206 miles in 3.9 hours. estimate his average speed.