Combine like terms.- 
x - 
y2 + 
x + 
y2
A. 
x2 - 
y4
B. 
x - 
y2 + 
y
C. 
x - 
y2
D. - 
x - 
y2
Answer: C
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Find the exact value of the expression.tan 345°
A. 
B. 2 + 
C. -2 - 
D. 
An objective function and a system of linear inequalities representing constraints are given. Graph the system of inequalities representing the constraints. Find the value of the objective function at each corner of the graphed region. Use these values to determine the maximum value of the objective function and the values of x and y for which the maximum occurs.Objective Functionz = 23x + 19yConstraints0 ? x ? 10 0 ? y ? 5 3x + 2y ? 6
A. Maximum: 230; at (10, 0) B. Maximum: 57; at (0, 3) C. Maximum: 325; at (10, 5) D. Maximum: 95; at (0, 5)
Find all values for which at least one denominator is equal to 0. Write answers using the symbol ?. Do not solve.
+ 
= 
A. x ? 
, 
, -19
B. x ? 0, 
, 
C. x ? 
, 
D. x ? 0, 
, 
, 19
Establish the identity.cot ( x + y) cot (x - y) = 
What will be an ideal response?