In the formula l=P•r•t what does r stand for

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.