Find the area of the region under the graph of f on [a, b].
f (x) = 
? 2x + 4; [?1, 2]
a. 3
b. –12
c. 12
d. –3
c. 12
Mathematics
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Find the indicated probability. Round your answer to 6 decimal places when necessary.Two cards are selected without replacement from a standard deck of 52 cards. What is the probability that both cards are the same color (i.e.either both black or both red)?
A. 0.490 B. 0.250 C. 0.500 D. 0.245
Mathematics
Factor the polynomial completely.81p4 - 126p3 + 49p2
A. p2(9p + 7)2 B. p2(81p + 1)(p + 49) C. p2(9p - 7)2 D. p2(9p - 7)(9p + 7)
Mathematics
Provide an appropriate response.Divide the radicals and simplify: 
A. 12
B. 7
C. 5
D. 14
Mathematics
Solve the problem.The area of a rectangle is 20m2 - 10m - 30. Find the length if the width is 4m - 6.
A. 5m - 5 B. 20m + 5 C. 20m - 5 D. 5m + 5
Mathematics