PLEASE HELP prove triangle ADB is congruent to triangle CDB (attached)

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?