7. Which is a recursive rule for the arithmetic sequence 17, 13, 9, 5? A (1) = 17; f(n) = f(n-1) - 4
B f(1) = 17; f(n) = f(n-1) + 4
C (1) = 5; f(n) = f(n-1) + 4
D f(1) = 5; f(n) = f(n-1) - 4

What number should be added to both sides of the equation to complete this square? x^2-10x=7

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.

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)