I need help answering these, will give brainliest to the correct answers. the question for one is
"determine if the triangles are right triangles"
and the question for three and five is
"find the missing side, round the answer to the nearest tenth ( 1 decimal place )​

Which best explains why this triangle is or is not a right triangle?

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

Solve the system of equations y= 3/2 - 1, -x+ y =-3