One angle in a triangle is 115 degrees. the other two angles are congruent. what is the measure of one of the missing angles?

Alawn mower manufacturer incurs a total of 34,816 in overhead costs and 388 per lawn mower in production costs. how many lawn mowers were manufactured if the average cost of productions is 660

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it.how many multiple-choice questions are on the test?

How do you use the elimination method for this question? explain, because i really want to understand!