1. prove that elementary matrices are invertible, and the inverse of an elementary matrix is another elementary matrix of the same type. again, you will need to consider all three types of elementary row operations.

Let f(x) = x+3 and g(x) = 1/x the graph of (fog)(x) is shown below what is the range of (fog)(x)?

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?

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax