Perform the indicated operations. Simplify the answer.
? 
A. 3
B. -3
C. -3i
D. 3i
Answer: B
Mathematics
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Solve.The sides of a triangle are 870 ft, 455 ft, and 855 ft. Find its perimeter.
A. 2,650 ft B. 4,360 ft C. 2,180 ft D. 1,725 ft
Mathematics
Write the vector v in the form ai + bj, given its magnitude 
and the angle ? it makes with the positive x-axis.
= 15, ? = 180°
A. v = -15j B. v = 15j C. v = -15i - 15j D. v = -15i
Mathematics
Write the improper fractions as whole or mixed numbers. 
A. 90
B. 92
C. 13
D. 
Mathematics
Use a combination of rules for exponents to simplify. Write answers with only positive exponents. Assume that all variables represent nonzero real numbers.t-8 ? t4 ? t-6
A. 
B. 
C. t18
D. t10
Mathematics