Solve.The sum of a number and its square is 20. Find the number.
A. 4 or -5
B. -4 or -5
C. 4 or 5
D. -4 or 5
Answer: A
Mathematics
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Find the requested vector.v = -2i + 5j + kFind a vector orthogonal to both v and i + j.
A. i + j - 7k B. 4i - 4j + 5k C. -i + j - 7k D. i - j - 3k
Mathematics
Find the standard deviation.25, 13, 32, 40, 61, 57
A. 38 B. 16.9 C. 36 D. 287.3
Mathematics
Convert the base-ten number to a number in the indicated base.2,874 to base five
A. 42,422five B. 42,444five C. 42,222five D. 42,424five
Mathematics
Solve the system by the substitution method. xy = 20x + y = 9
A. {(-5, 4), (-4, 5)} B. {(5, 4), (4, 5)} C. {(5, -4), (4, -5)} D. {(-5, -4), (-4, -5)}
Mathematics