K = 3 - 4i and m=-2 +9i. Write each expression in the form a + bi, where a and b are real numbers. Show all your work.

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2