Write an equivalent expression for n x a using only addition

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Choose the equation below that represents the line that passes through the point (2, 4) and has a slope of 3. a) y − 4 = 3(x − 2) b) y − 2 = 3(x − 4) c) y + 4 = 3(x + 2) d) y + 2 = 3(x + 4)