Simplify the expression. Assume that all variables are positive when they appear.
A. -3x21
B. -3x18
C. 3x7
D. -3x7
Answer: D
Mathematics
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Sketch the graph of the function on semilog paper.y = 2 e3x
What will be an ideal response?
Mathematics
Solve.Peter scored 68, 84, and 98 on three tests. How much must he score on the next test to have at least an 85 average?
A. at least 63 B. at least 83 C. at least 90 D. at least 29
Mathematics
Factor the difference of squares.81x2 - 4
A. (9x + 2)2 B. (81x + 1)(x - 4) C. (9x + 2)(9x - 2) D. (9x - 2)2
Mathematics
Graph on a plane.x ? 5
A. 
B. 
C. 
D. 
Mathematics