Write two equivalent expressions, one with parentheses and one without, for the opposite of the polynomial.-8y2 + 5xy4 - 6x2y2
A. -(-8y2 + 5xy4 - 6x2y2), 8y2 - 5xy4 - 6x2y2
B. -(-8y2 + 5xy4 - 6x2y2), 8y2 - 5xy4 + 6x2y2
C. -(8y2 + 5xy4 - 6x2y2), -8y2 - 5xy4 + 6x2y2
D. -(-8y2 + 5xy4 - 6x2y2), 8y2 + 5xy4 - 6x2y2
Answer: B
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Find the work done by F over the curve in the direction of increasing t.F = -8xi - 6x5y3j + (-7z + 9y2)k ; the path is 
where C1 is the straight line from 
to 
C2 is the straight line from (1, 0, 0) to (1, 1, 0), and C3 is the straight line from (1, 1, 0) to (1, 1, 1)
A. W = 0
B. W = - 4
C. W = - 
D. W = 1
Provide an appropriate response.True or false? If a < 0, then 
= i
.
A. True B. False
The lengths of the sides of a triangle are given. Determine if the triangle is a right triangle. If it is, identify the hypotenuse.12, 16, 20
A. right triangle; 16 B. right triangle; 12 C. right triangle; 20 D. not a right triangle
Solve the system of equations by using the inverse of the coefficient matrix if it exists and by the echelon method if the inverse doesn't exist. 3x + y = 15-2x + 5y = -27
A. (-3, 6) B. (-3, -6) C. No inverse, no solution for system D. (6, -3)