Clara has 17 blue envelopes. She has 3 fewer yellow envelopes than blue envelopes. She has 5 times as many green envelopes as yellow envelopes. How many envelopes does Clara have in all?

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

:)i need to know on which ones are corresponding, alternate interior, alternate exterior, or none of these.

What is number 31 as a sum of tens and ones?