Page 838 - Algebra 1

*20. Multi-Step The graph shows the height in feet, h, of a (119) tennis ball hit into the air with initial velocity of 30 feet
per second at time t seconds.
a. What type of function is this? How do you know?
b. Use the graph to approximate the maximum height that the ball reaches. Round to the nearest foot.
21. Identify the function family: y = 4x2 + 2. (119)
22. Error Analysis Two students are asked to list all the possible combinations choosing (118) 2 letters from A, B, and C. Which student is correct? Explain the error.
23. Use the discriminant of the equation -x2 + 2x + 1 = 0 to find the number of real (113) solutions.
24. Find the probability of a randomly tossed dart landing in 11 in. (120) the shaded area.
25. An investment of $2600 is made for 7 years at 8% simple interest. How much will (116) be in the account after 7 years?
26. Multi-Step Graph the function f(x) = ⎢x + 2 , then translate the function up by 3. (107) What function does this graph now represent?
27. Multiple Choice Find ∠A if cos A = _5 .
(117) A 44.4° B 45.6° 7 C 0.71° D 1.00°
12
y
8
4
O
x
-2
-1
1
Student A
AB, AC, BC
Student B
AB, AC, BA, BC, CA, CB
28. Solve 3x2 + 9x = 5.25 by completing the square. (104)
29. Find the probability of a randomly tossed bean bag not landing in (120) the shaded area.
2 in.
10 in.
4 in.
30. Multi-Step To work a word jumble the letters P, S, A, C, M, and H need to be (111) unscrambled.
a. How many different arrangements of the letters are possible?
b. What is the probability of writing the word CHAMPS on the first try if each letter is equally likely to be chosen?
Lesson 120 823