Sunday, April 25, 2010

Natasha averaged $15.50 a day for 5 days in groceries. How much altogether did she spend?

Answer: $15.50 x 5 = $77.50

Monday, April 19, 2010

Sally took 4 math tests and received an 86, 92, 90, and 78. If she is hoping to average an 90, what score does she need to receive on her fifth test?

Answer: Sally will not be able to average a 90 unless she is able to get extra credit. She would need a 104 on her fifth test.

Sunday, April 18, 2010

How many hamburgers can you get from 98 pounds of hamburger if each hamburger is 1/4 lb.

Answer: 392 hamburgers
Sally is twice as old as her sister Anna, and Anna is ten years younger than her brother Sam. If Sam is 12, how old is Sally and Anna?

Answer: You must find the variable expressions; Sam: x, Anna: x-10, Sally: 2(x-10)


Sam is 12 years old.
Anna is 2 years old.
Sally is 4 years old