Graph the parabola and give its vertex, axis, x-intercepts, and y-intercepts.f(x) = -x2 + 2x + 8
A. vertex (1, -9); axis is x = 1;
x-intercepts are 4 and - 2; y-intercept is -8
B. vertex (-1, 9); axis is x = -1;
x-intercepts are -4 and 2; y-intercept is 8
C. vertex (1, 9); axis is x = 1;
x-intercepts are 4 and - 2; y-intercept is 8
D. vertex (-1, -9); axis is x = -1;
x-intercepts are -4 and 2; y-intercept is -8
Answer: C
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A. x2 + 7 + 
B. x2 + 7
C. x2 + 7 + 
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Simplify the radical expression. Assume that all variables represent positive real numbers.
A. 4
B. 1
C. 2
D. 
Provide an appropriate response.A student was trying to solve the problem 
. The student knew that he or she should set 
but was confused about whether or not he or she should set 
, or 8 = 0 and 
. How would you advise this student?
What will be an ideal response?