Determine the size of matrix A and tell whether it is a square matrix, row matrix, column matrix, or none of these.A = 
A. 3 × 2; none of these
B. 6; row matrix
C. 3; row matrix
D. 2 × 3; none of these
Answer: D
Mathematics
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Evaluate using a number line.1 + (-4) 
A. 5 B. 3 C. -3 D. -5
Mathematics
Find the unit tangent vector of the given curve.r(t) = (5 + 11t2)i + (9 + 2t2)j + (8 + 10t2)k
A. T = 
i + 
j + 
k
B. T = 
i + 
j + 
k
C. T = 
i + 
j + 
k
D. T = 11i + 2j + 10k
Mathematics
Multiply.-6.8(0.07a3 - ab + 1.5b)
A. -0.476a3- 6.8ab + 10.2b B. -0.476a3 + 6.8ab -10.2b C. -0.476a3 - 6.8ab -10.2b D. -0.476a3 - ab + 1.5b
Mathematics
Factor the trinomial completely. If the trinomial cannot be factored, say it is prime.x2 - 11x + 18
A. (x + 9)(x + 1) B. (x - 9)(x - 2) C. (x + 9)(x - 2) D. prime
Mathematics