There are approximately about 25 million high school teachers in the world. They each sent out about 200 emails per year. About how many emails did all of the teacher in the world send each year?

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

What is the equation of a line passing through (-6,5) and having a slope of 1/3