An easier way to write this would be -9-15, which we can solve just by counting backwards for 15 numbers from -9. When we do this, we can see that his expression is equal to -24.
20•9=180
180•5=900
You have to brake down the problem to it simplest form
MachineA: y=120x
MachineA could pack in 12 min
y=120(12)
y=1440
MachineB could pack in 12 min
y=150(12)
y=1800
MachineB pack than MachineA
1800-1440
=360 candies
27.5/100=11/x
11 x 100 = 27.5x
1100=27.5x
1100/27.5=x
40 hits
Answer:
the question is not clear
