Mr. schmidt is making strawberry jam. he fills 31-pint jars and 13-quart jars. then he gives 20 quarts of jam to his friends. how many quarts of strawberry jam does he have left?

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

Can someone me with these two circle theorem questions asap?