Solve the equation. Give a general formula for all the solutions.2 cos ? + 1 = 0
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Provide an appropriate response.Rewrite the following equations in slope-intercept form; then find the slope and y-intercept: x - 2y = -8
What will be an ideal response?
Mathematics
Find the power of i.69 + 10i2
A. 79 B. 69 + 10i C. 59 D. 69 - 10i
Mathematics
Solve the problem.The total cost of replacing the front door is $447.03. Write the cost of the door in words.
A. seven hundred forty-four dollars and three cents B. four hundred forty-seven dollars and three cents C. four hundred three dollars and forty cents D. four hundred and forty dollars and three cents
Mathematics
Provide an appropriate response.The diagonals of a 
intersect at their common midpoint.
A. trapezoid B. pentagon C. parallelogram D. rhombus
Mathematics