Which subtraction model (take-away, missing addend, comparison, or measurement) corresponds best to the problem?Jane has $2 in her wallet. If she spends $2 on a book, how much money will she have left?
A. Comparison
B. Measurement
C. Take-away
D. Missing addend
Answer: C
Mathematics
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Find the unit tangent vector of the given curve.r(t) = 
i + 
j - 12tk
A. T = 
i + 
j - 
k
B. T = 
i + 
j - 
k
C. T = 
i + 
j - 
k
D. T = 
i + 
j - 
k
Mathematics
Express in terms of i.- 
A. -7
B. 7
C. -7i
D. 7i
Mathematics
(75ax2y6)/(15a2x-2y-2) =
a. 5a-1y8 b. 5x4y8 c. 5ax4y4 d. 5a-1y4 e. 5a-1x4y8
Mathematics
Simplify.(2x - 5y)2
A. 2x2 + 25y2 B. 2x2 - 20xy + 25y2 C. 4x2 - 20xy + 25y2 D. 4x2 + 25y2
Mathematics