Which of these formulas models this arithmetic sequence?

5.9, 5.5, 5.1, 4.7, 4.3, . .

an = -0.4 + (n – 1) × 5.9

an = (n – 1) × (-0.4)

an = 5.9 + (n – 1) × (-0.4)

an = 5.9 + (n – 1) × 0.4

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.