Question
A math teacher drove by a playground that was full of boys and dogs.The teacher notice there were a total of 40 heads and 100 feet. Hom many boys and how many dogs were there?
Answers
PsyDAG
Let x = boys and y = dogs
x + y = 40, then x = 40-y
2x + 4y = 100
Substitute 40-y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation.
x + y = 40, then x = 40-y
2x + 4y = 100
Substitute 40-y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation.
Poop
10 dogs
30 kids
30 kids
rffgfthtdcty
2-4=2-=+y=y765
Ali
120