Please answer correctly, will mark brainliest, thanks! ^-^

The first Answer is five because four times five plus ten is 30 and fives times six is 30

The second answer is X equals 3 because if you plug in 11x for y then add that to the existing x you get 12 and if you divide 36 by 12 you get 3

Step-by-step explanation:

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

where are the choices?