Divide.
A. - 1 - 2i
B. - 2 + 1i
C. 
+ 
i
D. 
+ 
i
Answer: D
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For a certain automobile engine, the bore B, in inches, is related to the displacement D, in cubic inches, by the formula
.
A: Make a graph of D versus B. Include bore sizes up to 5 inches.B: What displacement corresponds to a bore of 3.21 inches?C: What bore corresponds to a displacement of 191 cubic inches?
?
Round your answers to two decimal places if necessary.
What will be an ideal response?
At one high school, the mean time for running the 100-yard dash is 
with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Between 16.1 and 17 seconds
A. 34% B. 13.6% C. 12% D. 27%
Solve the system of equations graphically using a graphing calculator. Find all values to the nearest hundredth.x2 + y2 = 15x2 - y2 = 4
A. x = 3.08, y = 2.35; x = -3.08, y = 2.35 B. No solution C. x = 3.08, y = 2.35; x = 3.08, y = -2.35 D. x = 3.08, y = 2.35; x = -3.08, y = 2.35; x = 3.08, y = -2.35; x = -3.08, y = -2.35
Verify the identity.sin2(-?) + cos2(-?) = 1
What will be an ideal response?