Question

1. Which of the following conclusions is true about the statement below ?

x^2 = square root x

A. The statement is never true.
B. The statement is true when x = 0.
C. The statement is true when x is negative.
D. The statement is always true.

My answer is c.

2. Select the approximate values of x that are solutions to f ( x ) = 0, where f (x)=-2 x^2 +4 x + 9.

A. (-0.22 , 0.44 0
B. (-2 , 4)
C. (-2.00 , -4.50 )
D. ( -1.35 , 3.35 )

My answer is B.

3. Select the approximate values of x that are solutions to f ( x ) = 0, where f ( x)= -3 x^2 + 8 x +3.

A. ( 3.00 , -0.33 )
B. ( -3 , 8 )
C. ( -2.67 , -1.00 )
D. ( -1.00 , 2.67 )

My answer is A.

4. Select the approximate values of x that are solutions to f (x)=0, where f(x)=8 x^2 +7 x +4 .

A. ( -0.39 , 1.27 )
B. ( -8 , 7 )
C. ( -0.88 , -0.50 )
D. ( -2.00 , 1.75)

My answer is C.

Answer 1

You score 1/4

1C incorrect
2B incorrect
3A correct
4C incorrect

Answer 2

Hi Graham

I went back over my work and
1. A
2. D
4. A

please let me know if I miss something! Thank you

Answer 3

Select the approximate values of x that are solutions to f(x) = 0, where
f(x) = -3x2 + 6x + 9