Please answer multiple choices 1-5

MCR 3U1-T3 Date: Name: Test 3: Work Those Quads! K/U : Comm: Total: 19 11 30 Knowledge/Understanding Multiple choice: Please put the appropriate letter in the blanks on the left 1. Which of the following expresses -2 15 x 4 76 in simplest form? a. -12 ~10 b. -24 10 C. -72 -10 d. -48 10 2. Given A(x) = 3x + 5, which of the following is the equation of the inverse? a. fl = -3x2 - 5 f = +~3x- 5 b . f = + x - 5 d. fl =+ -5 3 x 3. What is the function for the graph shown? a. Ax) = (x - 2)2 - 3 b. A(x) = - (x+ 3)2+2 C. Ax) = - (x - 3)2 + 2 d. Ax) = - (x- 2)2 + 3 4. The cost, c(x), in dollars per hour of running a trolley at an amusement park is modelled by the function c(x) = 2.1x* - 12.7x + 1674, where x is the speed in kilometres per hour. At what approximate speed should the trolley travel to achieve minimum cost? a. about 2 km/h b. about 3 km/h c. about 4 km/h d. about 5 km/h 5. Given f(x) = 3(x + 1)' - 4, which of the following is the graph of the inverse? a. b. C. d