Determine whether the expression represents a difference of two squares.x2 - 16

A. Yes
B. No


Answer: A

Mathematics

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Find the magnitude of u × v and the unit vector parallel to u × v in the direction of u × v.u = - i + j + k, v = i + j + 2k

A. 2; - i + j - k
B. 2i + j - k
C. 8; i - j - k
D. 8; i - j + k

Mathematics

Simplify the polynomial answer and write it in descending order.Consider the square that has a side length given by (6a - 11) feet. Find the area of the square.(6a - 11) ft 

A. The area is 6a2 + 121 square feet. B. The area is 36a2 + 121 square feet. C. The area is 36a2 - 132a + 121 square feet. D. The area is 6a2 - 132a + 121 square feet.

Mathematics

Solve.A projectile is thrown upward so that its distance above the ground after t seconds is  After how many seconds does it reach its maximum height? Round to the nearest second.

A. 27 sec B. 36 sec C. 11 sec D. 9 sec

Mathematics

The base of a 52-ft ladder leaning against a wall begins to slide away from the wall. At the instant of time when the base is 48 ft from the wall, the base is moving at the rate of 9 ft/sec. ?  How fast is the top of the ladder sliding down the wall at that instant of time? ? 

A. 20.9 ft/sec B. 21.6 ft/sec C. 26.5 ft/sec D. 17.2 ft/sec

Mathematics