A bucket has 16 tennis balls and 10 ping pong balls . What is the probability of selecting a ping pong ball , replacing it and then selecting a tennis ball

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

The jurassic zoo charges $14 for each adult admission and $5 for each child. the total bill for 77 people from a school trip was $565. how many adults and how many children went to the zoo? i

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?