In a math class with 20 students, a test was given the same day that an assignment was due. There were 11 students who passed the test and 15 students who completed
the assignment. There were 9 students who passed the test and also completed the
assignment. What is the probability that a student chosen randomly from the class
failed the test and did not complete the homework?

eve and marks ratios are equivalent

step-by-step explanation:

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc