Write the expression in the standard form a + bi.2i15 - i7
A. 1
B. -1
C. i
D. -i
Answer: D
Mathematics
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Use the graph to answer the question.
Mike decides to buy shares of companies X and Y, which were initially selling for the same price. The changes in each stock's value over 90 days are shown in the graph above. When did the two stocks have the same value, other than when he bought them?
A. day 90 B. day 80 C. day 85 D. day 50
Mathematics
Use similar triangles and the fact that corresponding sides are proportional to find the length of the side marked with an x.
A. 39 in. B. 156 in. C. 4.3 in. D. 0.9 in.
Mathematics
Multiply using the distributive property.-3(x - 9)
A. -3x + 9 B. -3x + 27 C. -27x D. 3x + 27
Mathematics
Use the table of integrals to find the integral.
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Hint: First use the substitution 
.
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A. 
B. 
C. 
D. 
Mathematics