Let v and w be two vectors in the plane with given magnitudes. The angle between v and w is ?. Find the expression. Round the answer to the nearest tenth.
= 7, 
= 15, ? = 30°
Find 
A. -159.9
B. 21.4
C. 9.6
D. 16.6
Answer: B
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Translate the situation into mathematical language. You need not actually solve the problem.A piece of wire 124 in. long is to be cut into two pieces, and those pieces are each to be bent to make a square. The area of one square is to be 225 in.2 greater than that of the other. How should the wire be cut?
A. Let x be the length of one piece of wire; x
= 225
B. Let x be the length of one piece of wire; 
2 + 
2 = 225
C. Let x be the length of one piece of wire; 
2 - 
2 = 225
D. Let x be the length of one piece of wire; 
2 - 
2 = 225
Make the indicated conversion within units of time.Convert 480 minutes to hours.
A. 4 hours B. 8 hours C. 192 hours D. 20 hours
Graph the system of inequalities. Shade the region that represents the solution set.x2 + y ? 1x2 - y ? 2
A. 
B. 
C. 
D. 
Factor completely.36 - (x + 5y)2
A. (6 + x + 5y)(6 - x - 5y) B. (6 + 5xy)(6 - 5xy) C. (6 + x + y)(6 - x - y) D. (6 + x - 5y)(6 - x - 5y)