Simplify = 8t+3r-7t-9r what is the answer? ?

What other information do you need to prove triangle dac=bca by asa

The distance between two cities is 368 miles. if the scale on the map is 1/4 inch=23 miles, what is the distance between the cities on the map?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.