If 100 beach umbrellas have a mass of 865.2kg what is the mass of each umbrella

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0

Given: m zade = 60° and m2cdf = (3x + 15) prove: x = 15

Which phrase best describes the word definition in an axiomatic system? a. the accepted meaning of a term b. the statement of an axiom c. an accepted fact that is not proven d. a fact proven by using logic