To find out the answer, you first need to know how many apples you have. So since you put 4 apples in 4 drawers, we just multiply 4×4 to get our answer so, 4×4= 16, So you have 16 apples. To find out how many you gave your friend, you just subtract 24 - 16 = 8, So your friend got 8 apples.
Answer:
-x - 3y + z
Step-by-step explanation:
Think of a imaginary 1(-1 because of the sign) in front of the parenthesis and distribute it to the other number and so x will become -x, 3y will become -3y and -z will become z because two negatives make a positive.
31.
32.
33.
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Answer:
6 knots
Step-by-step explanation:
Let the speed be v knots
then time taken to cover 500 M = 500 / v hrs
fuel consumption /hr = 216 + 0.5v^3
let F be the fuel consumption for trip
= [500/v][216 + 0.5v^3]
= 500[216/v + 0.5v^2]
dF/dv = 500[ - 216/v^2 + v]
d^2F/d^2v = 500[432/v^3 + 1] , i.e. +ve
so setting dF/dv will give a minima
500[ -216/v^2 + v] = 0
or v = 216/v^2
or v^3 = 216
solving, we get v = [216]^(1/3) = 6 knots
This is easy once you look at it you just have to move the decimal 7 places and you'll get 24,000,000
