Factor the difference of two squares. Assume that variables represent whole numbers.x4 - 64
A. (x2 - 8)2
B. (x2 + 8)2
C. (x2 + 8)(x2 - 8)
D. prime
Answer: C
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Find the flux of the vector field F across the surface S in the indicated direction.F(x, y, z) = xzi + yzj + k , S is the cap cut from the sphere x2 + y2 + z2 = 9 by the plane 
direction is outward
A. 80? B. 40? C. 24? D. - 40?
Translate to a system of three equations; then solve.Michael's bank contains only nickels, dimes, and quarters. There are 42 coins in all, valued at $3.75. The number of nickels is 6 short of being three times the sum of the number of dimes and quarters together. How many dimes are in the bank?
A. 5 B. 7 C. 30 D. 10
Graph. Label any intercepts and determine the slope of the line. If the slope is undefined, state this.y = 7
A. y-intercept: (0, 7), m: 0
B. y-intercept: (0, 0), m: 7
C. y-intercept: (0, 0), m: 
D. y-intercept: (7, 0), m: undefined
Simplify.
A. -4 B. 3 C. -3 D. -9