Estimate the sum as indicated. Then answer the question.Estimate the following sum by first rounding to the nearest ten. Does the estimate give you reason to doubt the stated sum?
A. Estimate: 12,950 ; yes
B. Estimate: 12,710 ; yes
C. Estimate: 12,950 ; no
D. Estimate: 12,710 ; no
Answer: D
Mathematics
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Match the vector equation with the correct graph.
r(t) = 
ti +(2 - t)k; 0 ? t ? 2
A. Figure 8 B. Figure 1 C. Figure 5 D. Figure 3
Mathematics
Reduce to lowest terms.- 
A. - 
B. - 
C. - 
D. 
Mathematics
Solve the system of equations by the substitution method. Check your solutions.
A. {(6, 7), (7, 6)} B. {(6, -7), (7, -6)} C. {(-6, 7), (-7, 6)} D. {(-6, -7), (-7, -6)}
Mathematics
Add.-12 + 25 + (-9)
A. 22 B. 46 C. 4 D. 28
Mathematics