Ralph is 3 times as old as sarah. in six years, ralph will be only twice as old is sarah will be then. find ralphs age now.

if x represents sarah's age now, which of the following expressions represents ralphs age in six years?

a: 2x
b: 6x
c: 2x+6
d: 3x+6

What is this inequality notation? t is less then or equal to 2

Aculture started with 3000 bacteria. after 5 hours it grew to 3900 bacteria. predict how many bacteria will be present after 9 hours

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?