1.
What are the real roots of the quadratic equation whose related function is graphed below?
A.
4
B.
-4, 4
C.
-2
D.
-4
Hint
2.
Solve
x
2
– 6
x
+ 5 = 0 by graphing.
A.
5
B.
1, 5
C.
-1
D.
1
Hint
3.
The equation
x
2
+ 1 = -3
x
does not have integral roots. State the consecutive integers between which the roots lie.
A.
between -3 and -2 and between 0 and 1
B.
between -3 and -2 and between -1 and 0
C.
between 0 and 1 and between 2 and 3
D.
between -1 and 0 and between 0 and 1
Hint
4.
The sum of two numbers is 12, and the product of the numbers is 36. What are the numbers?
A.
9 and 4
B.
6 and 9
C.
6 and 6
D.
7 and 5
Hint
5.
In baseball, a pop fly should be easily caught if it stays in the air for 7 seconds. Suppose a ball that is hit can be represented by the function
y
= –16
t
2
+ 125
t
+ 5, where
y
is the height after
t
seconds. Will the ball be considered an easy catch?
A.
yes, because
t
< 7
B.
yes, because
t
> 7
C.
no, because
t
< 7
D.
no, because
t
> 7
Hint