Perform the indicated operation. Write the result in the form a + bi.
? 
A. -21i
B. 21i
C. 21
D. -21
Answer: B
Mathematics
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Convert to Fahrenheit. Use the formula F = 
C + 32 or F = 1.8C + 32. Round your answer to the nearest tenth if necessary.45°C
A. 113°F B. 56.8°F C. 87.4°F D. 138.6°F
Mathematics
Divide using algorithms.
?
?
A. 518 B. 504 C. 74 D. 63 E. 73
Mathematics
Find the solutions to the system of equations by the addition method. x - 2y = -12x - 2y = 4
A. (6, 5) B. (5, 3) C. (6, 3) D. (-5, 2)
Mathematics
Find the product. Assume all variable exponents represent whole numbers.(x - 11)(x2 + 2x - 8)
A. x3 - 9x2 - 14x - 88 B. x3 + 13x2 + 14x - 88 C. x3 + 13x2 + 30x + 88 D. x3 - 9x2 - 30x + 88
Mathematics