Simplify.21 ÷ 3 ÷ 9

A. 63
B.
C.
D.


Answer: B

Mathematics

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Find the LCM of 6, 7, and 30. 

A. 1260 B. 1050 C. 210 D. 1470

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The graphs show the position s, velocity v = ds/dt, and acceleration a = d2s/dt2 of a body moving along a coordinate line as functions of time t. Which graph is which?

A. C = position, B = velocity, A = acceleration B. B = position, C = velocity, A = acceleration C. C = position, A = velocity, B = acceleration D. B = position, A = velocity, C = acceleration

Mathematics

Identify the quadrilateral.

A. Parallelogram B. Rectangle C. Trapezoid D. Rhombus

Mathematics

Solve.The Epson Stylus 850 can print Helen's class project in 24 minutes. The Epson Stylus 500 can print the project in 30 minutes. If the two printers work together, how long would they take to print out the project?

A. 9 min
B. 13 min
C.  min
D. 120 min

Mathematics