5x+2y=-9 8x+2y=-15 a.) one solution b.) infinitely many solutions c.) no solutions

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?

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.

Find the distance between the point (-3,-4), and (see the picture below)