Given an arithmetic sequence in the table below, create the explicit formula and list any restrictions to the domain.

a. a_n = 9 − 3(n − 1) where n ≤ 9
b. a_n = 9 − 3(n − 1) where n ≥ 1
c. a_n = 9 − 6(n − 1) where n ≤ 9
d. a_n = 9 − 6(n − 1) where n ≥ 1

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882