Determine all critical points for the function.y = 4x2 - 128
A. x = 0, x = 4, and x = -4
B. x = 0
C. x = 0 and x = 4
D. x = 4
Answer: D
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Find the intersection.6x + 2y + 9z = -10, -9x - 9y - 8z = 10
A. x = 65t - 70, y = -33t - 30, z = 36t
B. x = 65t - 
, y = -33t + 
, z = -36t
C. x = -2340t - 70, y = 1188t + 30, z = 36t
D. x = -65t + 70, y = 33t + -30, z = 36t
Solve the number problem by finding the value of the unknown number.If three times a number is decreased by 1, the result is 20.
A. 6 B. 8 C. 10 D. 7
Translate the sentence into if-then form. ? All prime numbers greater than 2 are odd numbers. ?
A. If it is an odd number, then it may be a prime number greater than 2. B. If it is a prime number greater than 2, then it is an odd number. C. If it is an odd number, then it is a prime number greater than 2. D. If it is an odd number, then it is not a prime number greater than 2. E. none of these
Find the indicated cross product.v = -4i - 3j - 4k, w = 4i + 2j + 5kFind v × w.
A. 4i + 7j - 4k B. -7i + 4j + 4k C. 2i + 4j + 4k D. -23i + 36j - 20k