Which of the following is equivalent to 3a + 4b – (–6a – 3b) ?
a. 16ab
b. –3a + b
c. –3a + 7b
d. 9a + b
e. 9a + 7b

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

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5

Tell whether the two rates form a proportion