Find the exact value of the expression. Do not use a calculator.sin 135° - sin 270°
A. 
B. 
C. 2
D. 
Answer: B
Mathematics
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Perform the indicated operation. Write the result in standard form.(-4 - 8i) + (9 + 5i)
A. 5 - 3i B. 5 + 3i C. 9 - 3i D. 9 + 3i
Mathematics
Find the value of the algebraic expression at the given replacement value.-x2 - 6y
when x = -2, y = -4
A. 16 B. 20 C. -28 D. -20
Mathematics
Provide an appropriate response.Find the difference of 782 and 235.
A. 647 B. 531 C. 557 D. 547
Mathematics
Determine whether the graph of the equation is symmetric with respect to the x-axis, the y-axis, and/or the origin.y = x + 5
A. x-axis B. origin C. y-axis D. x-axis, y-axis, origin E. none
Mathematics