Determine whether the matrix is regular.
a. Not regular
b. Regular
b. Regular
Mathematics
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Approximate the circumference of the circle using 3.14 for ?.
A. 16.2 in. B. 32.4 in. C. 15.7 in. D. 31.4 in.
Mathematics
Find the direction angle of the vector v. Round to the nearest tenth if necessary. v = -i + 6j
A. 189.5° B. 260.5° C. 170.5° D. 99.5°
Mathematics
Write the rational expression in lowest terms.
A. 
B. - 
C. 
D. 
Mathematics
Introduce slack variables as necessary, and write the initial simplex tableau for the problem.Find x ? 0 and y ? 0 such that2x + 5y ? 153x + 3y ? 19 and 4x + y is maximized. 
A. 
B. 
C. 
D. 
Mathematics