Answer:
29
Step-by-step explanation:
The total number of animals is ...
(number of cows) + (number of chickens) + (number of ducks) = (total)
Filling in the given numbers, we have ...
3 + 8 + (number of ducks) = 40
Subtracting 11 from both sides of this equation gives us ...
number of ducks = 29
c
51
10 by 5 is 50 plus 9 is 59 subtract 8 is 51
10*5+9-8 = 51
