The size of two matrices is given. Find the size of the product AB and the product BA, if the products exist.A is 2 × 4, B is 2 × 4.
A. AB is 2 × 4, BA is 4 × 2.
B. AB is 4 × 2, BA is 2 × 4.
C. AB is 2 × 2, BA is 4 × 4.
D. AB is undefined, BA is undefined.
Answer: D
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Given the points (-6, -8) and (4, -6). Find a third point so that the three points form the vertices of a right triangle. ?
A. (-16, 4) B. (-11, 17) C. (-6, -9) D. (5, -6) E. (4, 6)
Find the extreme values of the function subject to the given constraint.
A. Maximum: 18 at 
minimum: -18 at 
B. Maximum: 4 at 
minimum: -4 at 
C. Maximum: 18 at 
minimum: -18 at 
D. Maximum: 4 at 
minimum: -4 at 
Solve the problem.Two cards are drawn in order from a well shuffled deck of 52 cards. The probability that both cards are hearts is given by
A. 
× 
.
B. 
.
C. 
× 
.
D. 
× 
.
E. none of these
The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).2x + 3y = 6
A. r(2 sin ? + 3 cos ?) = 6 B. 2 cos ? + 3 sin ? = 6r C. 2 sin ? + 3 cos ? = 6r D. r(2 cos ? + 3 sin ?) = 6