The sequence an can be defined by the formula an=3(23)n. Which of the following is a recursive definition of the formula?
A. a1=2 an+1=2an3
B. a1=3 an+1=2an3
C. a1=2 an+1=an+23
D. a1=3 an+1=an+23

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?