Solve the problem.How many 3-letter codes can be formed using the letters A, B, C, D, and E? No letter can be used more than once.
A. 10
B. 20
C. 60
D. 40
Answer: C
Mathematics
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Find parametric equations for the line described below.The line through the points P(-1, -1, 1) and Q(-3, 3, -5)
A. x = -2t - 1, y = 4t - 1, z = -6t + 1 B. x = -2t + 1, y = 4t + 1, z = -6t - 1 C. x = t + 2, y = t - 4, z = 1t + 6
Mathematics
Determine the principal value without using a calculator.- 4
A. -5 B. Not real number C. 25 D. 8.368
Mathematics
Find the exact value under the given conditions.sin ? = 
, 0 < ? < 
; cos ? = 
, 0 < ? < 
Find cos (? + ?).
A. 
B. 
C. 
D. 
Mathematics
Determine whether the function is even, odd, or neither.f(x) = x3 - 
A. Even B. Neither C. Odd
Mathematics