Find the maximum y-value on the graph of y = f(x).f(x) = -x2 + 2x + 1
A. 1
B. -2
C. 2
D. -1
Answer: C
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Solve the problem.Select an appropriate graph of a twice-differentiable function y = f(x) that passes through the points 
, 
, (0,0), 
and (
,1), and whose first two derivatives have the following sign patterns.y' : 
y":
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A. 
B. 
C. 
D. 
Simplify the expression by using a sum or difference identity.cos (260°) cos (20°) + sin (260°) sin (20°)
A. 
B. - 
C. - 
D. 
Write the English sentence as an equation in two variables. Then graph the equation.The y-value is one increased by the square of the x-value.
A. y = 1 - x2
B. y = 1 + x2
C. y = -1 + x2
D. y = 1 + 2x
Provide an appropriate response.Solve for x: 
+ 
= 1
A. 0 B. 2 C. -2 D. 8 E. -8