Alocal hamburger shop sold a combined total of 505 hamburgers and cheeseburgers on tuesday. there were 55 more cheeseburgers sold than hamburgers. how many hamburgers were sold on tuesday?

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?