John bought a bicycle for $20 sold it for $30 rebought it for $40 and resold it for $50. How much money did he make or loose?

While taking a test, a student is asked to calculate a probability. He writes his answer as "2.5," not intending it to mean "2.5%." could this answer possibly be correct? Why or why not?

Add. 4 7/12 + 2 3/4 + 7 5/12

consider the function f (x) = |x+3| and g (x) = -|x+3| the graph of g can be obtained from the graph of f by what transformation

What are the factors of 78?

Whats 3/1/11 as a decimal

Describe a general method for deciding which variable to eliminate when using linear combinations. can all systems be solved by linear combinations? Explain

Janet hikes a trail at a local forest each day. The trail is 3.6 miles long, and she has hiked 5 days in the past week. How many miles has Janet hiked in the past week?

the test scores for 10 students were 61,67,81,83,87,88,89,90,98, and 100. which frequency table represents this data set?

Max bought tools costing $75. He made a $30 down payment and plans to pay off the rest in 5 months. How much will Max's monthly payments be

Donna wants to give her child some cough medicine. However, she is unsure about the dosage, so she reads the directions. She notices that the dosage differs based on age. Determine the independent variable and the dependent variable A.