Using determinants, solve for x and y: x + 3y = 10; 3x + 4y = 6
a. 2 4
x = -4Ä y = -4Ä
5 5
b. 2 4
x = -4Ä y = 4Ä
5 5
c. 2 4
x = 4Ä y = 4Ä
5 5
d. 4 4
x = 4Ä y = 4Ä
e. 4 3
x = 4Ä y = 4Ä
5 5
b. 2 4
x = -4Ä y = 4Ä
5 5
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Find the sum of the first n terms of the following arithmetic sequence:Second term is 13, third term is 21; n = 17
A. 1,219 B. 1,173 C. 1,085 D. 1,112
Solve the problem.Suppose you purchase an eight-year bond for $5000. The face value of the bond when it matures is $6550. Find the APR.
A. 3.5%
B. 3%
C. 
%
D. 4%
E. 
%
Use the counting principle to obtain the answer.At a lumber company that sold shelves, a customer could choose from 3 types of wood, 4 different widths and 5 different lengths. How many different types of shelves could be ordered?
A. 35 B. 36 C. 60 D. 12
Solve the problem.If cot ? = -7.1, find the value of cot ? + cot (? + ?) + cot (? + 2?).
A. -21.3 + 3? B. -19.3 C. -21.3 D. undefined