What's the LCM of 21 and 30

Hillel is juggling flaming torches to raise money for charity. his initial appearance raises $500\$500 $500 , and he raises $15\$15 $15 for each minute of juggling performance. the amount rr r of money hillel raises is a function of tt t , the length of his performance in minutes. write the function's formula.

Complete the equation of the live through (-1,6) (7,-2)

D. in a discrete probability distribution, the sum of the probabilities for the discrete variables will be > 1. true or false