Leon had a test average of 89.2 last semester. His first four test grades were 86, 95, 94, and 90. Use the formula x‾=x1+x2+…+xn/n to find his score on the fifth test.

What is the 12th term of b(n)=-4-2(n-1)

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.

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?