Find the requested area.Find the area, if it exists, of the region bounded by the curve y = 7x-2, the x-axis, and on the left by x = 1.
A. 
B. 49
C. 14
D. 7
Answer: D
Mathematics
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Solve.For f(x) = (x + 5)(x - 6)(x - 9), find all x-values for which f(x) > 0.
A. (-?, -5) ? (6, 9) or {x|x < -5 or 6 < x < 9} B. (-5, 6) ? (9, ?) or {x|-5 < x < 6 or x > 9} C. (-?, 6) or {x| x < 6} D. (9, ?) or {x|x > 9}
Mathematics
Evaluate the expression. 
A. 
B. 126
C. 3024
D. 15120
Mathematics
Write the ratio as a fraction in simplest form.4 : 7
A. 
B. 
C. 
D. 
Mathematics
The sizes of two matrices are given. Find the size of the product AB and the size of the product BA, if the given product can be calculated.A is 2 × 4; B is 4 × 2.
A. AB is 2 × 2; BA cannot be calculated. B. AB cannot be calculated; BA is 4 × 4. C. AB is 4 × 4; BA is 2 × 2. D. AB is 2 × 2; BA is 4 × 4.
Mathematics