Which relationship is always true for the angles r, x, y, and z of triangle abc?
select one:
a. x + z = y
b. 180 degrees − x = r
c. x + y + z = 180 degrees
d. x + y + z = 90 degrees

Ineed i do not understand i'm only 8

Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?

Which number line correctly shows 0.8 + 0.3?