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

i belive those are the ones that are under 90 degreese.

step-by-step explanation:

college

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

hope this !