Determine the size of matrix A and tell whether it is a square matrix, row matrix, column matrix, or none of these.A = [3 -8 7 7 ]
A. 1; square matrix
B. 1 × 4; row matrix
C. 4; row matrix
D. 4 × 1; column matrix
Answer: B
Mathematics
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Evaluate the integral.
A. - 
cos 5x - 
x sin 5x + C
B. - 
cos 5x - 9x sin 5x + C
C. - 
cos 5x - 
sin 5x + C
D. - 
cos 5x - 
x sin 9x + C
Mathematics
Find the length of the unknown side of the right triangle.The lengths of the legs are 15 meters and 
A. 37 m B. 39 m C. 33 m D. 27 m
Mathematics
The two figures are congruent. Find the measure of the requested side or angle.The length of 
A. 
= 7.8
B. 
= 12
C. 
= 3.9
D. 
= 6
Mathematics
Solve the problem.In a microbiology class of 37 students, 23 students are graduate students. What fraction of the students are graduate students?
A. 
B. 
C. 
D. 
Mathematics