Page 130 - Algebra

8. Sam, a renowned footballer, kicks the ball in the air and it’s given by the function h(t) = 120t – 8t2
where h is the height in meters, and t is the time in seconds.
After how many seconds will the ball hit the ground before rebounding?
a) 5 seconds b) 10 seconds c) 15 seconds d) 20 seconds e) Cannot be determined
9. Solve the two systems of equation algebraically. y=x2 +2x–3
x + y – 7= 0
10.
a) (2, 5) b) (–5, 12)
c) (5, 2) d) Both a) and b) e) Both b) and c)
The graph of the three equations is given by the following graph. Find the number of solutions of the system of equations.
a) 0 b) 1 c) 2 d) 3 e) Infinitely many
11. The equation of a parabola is given by:
f(x)=x2 –9x–22
Which of the following represents the equivalent form of the equation displaying the x-intercepts of the parabola as constants?
a)1and11 b)–2and11 c)1and–2 d)–2and10 e) 1 and 10
2
12. A graph represents a parabola with equation y = a(x – h) . One of the intercepts is (–5, 0), and the y-
intercept of the parabola is 10. What is the value of a? a) 2 b) 5
c) 2 d) 5 4
e) 5
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Algebra I & II