Simplify.21 ÷ 3 ÷ 9
A. 63
B. 
C. 
D. 
Answer: B
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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
Find the LCM of 6, 7, and 30.
A. 1260 B. 1050 C. 210 D. 1470
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
Identify the quadrilateral.
A. Parallelogram B. Rectangle C. Trapezoid D. Rhombus