The sum of 2 numbers is 21. The second number is 6 times the first number.
Work out the two numbers.

both numbers are 18 and 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

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.