Find the cross-product and determine whether the proportion is true or false.
= 
A. 264 = 264; true
B. 66 ? 264; false
C. 132 = 132; true
D. 72 ? 242; false
Answer: C
Mathematics
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Perform the operation and give the answer as a fraction in lowest terms.
A. - 
B. - 
C. 
D. - 
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Factor by grouping.18a3 + 12a2b - 15ab2 - 10b3
A. (18a2 - 5b2)(a + 2b) B. (6a2 - 5b2)(3a + 2b) C. (6a2 + 5b2)(3a - 2b) D. (6a2 - 5b)(3a + 2b)
Mathematics
The graph of a function f is given. Use the graph to answer the question.How often does the line y = -20 intersect the graph?
A. once B. twice C. three times D. does not intersect
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Solve the system.2x + 6y + 4z = 36 x + 3y + 2z = -6 x + y + z = -6
A. (-6, 2, 3) B. (3, 2, -6) C. (-6, 3, 2) D. No solution
Mathematics