3. abcd is a trapezoid with midsegment ef. if ad = 5x - 11, ef = 3x + 7, bc = 2x +7, how many units in
length is ef?
5 total points -(1 point for equation, 2 points for algebra procedures, 1 point for correct value of x, and 1 point for
correct length of ef)

Most animals give birth during a general time of year. this is because animals naturally breed so that their young will be born at the time of year when there will be adequate food supply. the bar graph shows the number of live births of a jackrabbit native to california over the course of year x. based on the data, which of the following would be an appropriate conclusion? a) in general, rabbits give birth during the spring months b) in general, rabbits give birth during the summer months c) in general, m california jackrabbits give birth during the spring months d) in general, california jackrabbits give birth during the summer months

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?