Find the quotients. 25÷34 94÷-34 -57÷-13 -53÷16

7x+8y=-18, 4x-9y=-3 solve the system of equations

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x