Solve the problem.Find the expected number of girls in a family of 4.
A. 2.5
B. 1.5
C. 2
D. 1.75
Answer: C
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Rotate the coordinate axes to change the given equation into an equation which has no cross product (xy) term. Identify the graph of the equation as a hyperbola, ellipse, parabola, a straight line, or parallel lines.3x2 - 2
xy + y2 - 3
x + 7y = 0
A. 4u2 + 2
u + 8v = 0; Parabola
B. 4v2 + 8v = 0; Parallel lines
C. -u2 + 4v2 + 2
u + 8v = 0; Hyperbola
D. u2 + 4v2 + 2
u + 8v = 0; Ellipse
Add. Do not use a number line except as a check.2.7 + (-6.9)
A. 9.6 B. -9.6 C. 4.2 D. -4.2
Solve the problem.A ceramics workshop makes wreaths, trees, and sleighs for sale at Christmas. A wreath takes 3 hours to prepare, 2 hours to paint, and 9 hours to fire. A tree takes 14 hours to prepare, 3 hours to paint, and 4 hours to fire. A sleigh takes 4 hours to prepare, 16 hours to paint, and 7 hours to fire. If the workshop has 113 hours for preparation time, 64 hours for painting, and 101 hours for firing, how many of each can be made?
A. 2 wreaths, 7 trees, 6 sleighs B. 7 wreaths, 6 trees, 2 sleighs C. 6 wreaths, 2 trees, 7 sleighs D. 8 wreaths, 7 trees, 3 sleighs
Solve the inequality and graph the solution on the real number line.
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A. 
B.
C.
D.
E.
