12. A rectangle's length is 3 cm less than twice its width. If the length is decreased by 2 cm and the width is decreased by 1 cm the perimeter
will be 24 cm. Find the dimensions of the original rectangle.

B.the point lies directly on the regression

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.