Match the vector equation with the correct graph.
r(t) = -3ti + 2tj + 2tk; 0 ? t ? 1
A. Figure 3
B. Figure 5
C. Figure 1
D. Figure 8
Answer: A
Mathematics
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Factor the expression by removing the greatest common factor.81x9y9 + 81x3y6 + 54x5y3
A. 27x3(3x6y9 + 3y6 + 2x2y3) B. 27(3x9y9 + 3x3y6 + 2x5y3) C. 27x3y3(3x6y6 + 3y3 + 2x2) D. No common factor
Mathematics
Write the rational expression in lowest terms.
A. 
B. 
C. 
D. 
Mathematics
Answer the question asked. When necessary, round to the nearest hundredth.A barge takes 4 hours to move (at a constant rate) downstream for 40 miles, helped by a current of 3 miles per hour. If the barge's engines are set at the same pace, find the time of its return trip against the current.
A. 4 hr B. 7 hr C. 80 hr D. 10 hr
Mathematics
Is the following correspondence a function?DomainRange 
A. function B. not a function
Mathematics