Factor completely. State that the polynomial is prime if it cannot be factored.72a4 - 50b2
A. 2(6a2 + 5b)(6a2 - 5b)
B. prime
C. 2(6a2 + 5b)2
D. 2(6a2 - 5b)2
Answer: A
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Multiply.
A. - 
B. 
C. - 
D. - 
Solve the problem.The water acidity in a pool is considered normal when the average pH reading of three daily measurements is greater than 7.2 and less than 7.8. If the first two pH reading are 7.25 and 7.85, find the range of pH values for the third reading that will result in the acidity level being normal.
A. 6.5 < x < 8.3 B. 7.7 < x < 9.5 C. 7.1 < x < 8.9 D. 7.2 < x < 7.8
Solve and graph.x ? 3 or x ? 7
A. (-3, 7)
B. (-?, 3] ? [7, ?)
C. (3, 7)
D. [-7, -3]
A 6-ft tall man is walking away from a street light 12 ft high at a speed of 6 ft/sec . How fast is the tip of his shadow moving along the ground? ? __________ ft/sec
Fill in the blank(s) with the appropriate word(s).