Answer:
21
Step-by-step explanation:
whats 9 + 10
it shows that y is 3 quarters of x so for example if x is 12 then y would be 9 since it is 3 quarters of x :)
124.6
maths
Explicit: a₁=61 aₙ=a₁ -3ₓ(n-1)
Recursive: a₁=61 aₙ=aₙ₋₁ - 3
Answer: linear
