Use the commutative property of multiplication to write an equivalent algebraic expression.4 ? x
A. 4x
B. x ? 4
C. 
D. x + 4
Answer: B
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Solve the right triangle. Round results to an appropriate number of significant digits.a = 2.6 cm, b = 2.2 cm
A. A = 46°, B = 44°, c = 3.4 cm B. A = 50°, B = 40°, c = 3.4 cm C. A = 40°, B = 50°, c = 3.4 cm D. A = 58°, B = 32°, c = 4.8 cm
Use set-builder notation to describe all real numbers satisfying the given conditions.A number increased by 8 is no more than two times the number.
A. {x|x + 8 ? 2x} or 
B. {x|x + 8 ? 2x} or 
C. {x|x + 8 < 2x} or 
D. {x|x + 8 < 2x} or 
Find the average rate of change for the function over the given interval.Find the average rate of change from (-1, 3) to (2, -3).
A. 
B. -2
C. - 
D. 2
Find the direction the parabola opens, the coordinates of the vertex, the equation of the axis of symmetry and draw the graph.x = -3(y - 5)2 + 4 
A. 
opens right; vertex (4, 5);
axis of symmetry y = 5
B. 
opens right; vertex (- 4, 5);
axis of symmetry y = 5
C. 
opens left; vertex (- 4, 5);
axis of symmetry y = 5
D. 
opens left; vertex (4, 5);
axis of symmetry y = 5