Solve the problem.In how many ways can 4 people be chosen and arranged in a straight line, if there are 7 people from whom to choose?
A. 210
B. 420
C. 28
D. 840
Answer: D
Mathematics
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Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Use the figure to find the width W of the rectangle from its length and area A. Determine W when 
A. 8x - 2; 46 yd B. 2x + 8; 20 yd C. 8x + 2; 50 yd D. 8x - 6; 42 yd
Mathematics
An order of award presentations has been devised for seven people: Jeff, Karen, Lyle, Maria, Norm, Olivia, and Paul.In how many ways can the people be presented?
A. 5040 B. 720 C. 49 D. 2520
Mathematics
Fill in the blank with the correct inequality symbol, < or >, to make a true comparison statement.0 _____ -6
A. 0 < -6 B. 0 > -6
Mathematics