Simplify the expression. Assume that all variables are positive when they appear.

A. 9x2y
B. 63xy
C. 3x2y
D. 3x4y2


Answer: C

Mathematics

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Decide whether events A and B are overlapping or non-overlapping.Event A is that you study at least 5 hours for your math test. Event B is that you study at most 6 hours for your math test.

A. Non-overlapping B. Overlapping

Mathematics

Solve the system by the substitution method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.

A. no solution; ?
B. {(-4.5, -1.85)}
C. infinitely many solutions; { y = 1.1x + 3.1} or { y = 0.5x + 0.4}
D. {(4.5, -1.85)}

Mathematics

State whether the ordered pairs shown in the table are modeled exactly by the linear equation.y = 9 - x

A. Yes B. No

Mathematics

Find the LCD for the rational expression.

A. (x + 1)(3x - 1) B. (x - 1)(3x + 1) C. 3x - 1 D. x + 1

Mathematics