If the pattern below follows the rule "Starting with 10, every consecutive line
has a number 1 less than the previous line," how many marbles must be in the
seventh line?

Which of these choices show a pair of equivalent expressions?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Amanager recorded the number of bicycles sold by his company each quarter. his projected sales after t years is given by the expression below. which of the following statements best describes the expression? a. the initial sales of 575 bicycles increases at the rate of 4% over 4 quarters. b. the initial sales of 575 bicycles increases at the rate of 18% over 4 years. c. the initial sales of 575 bicycles increases at the rate of 4% over t quarters. d. the initial sales of 575 bicycles increases at the rate of 18% over t years.