If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth. Variables represent any real number.
A. 100
B. 31
C. -10
D. 10
Answer: D
Mathematics
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Find the area of the triangle using Heron's formula. Round your answer to two decimal places as needed.
A. 5.81 m2 B. 11.62 m2 C. 16.43 m2 D. 8.22 m2
Mathematics
Multiply.(5x2)(7x5)
A. 35x7 B. 12x7 C. 35x10 D. 12x10
Mathematics
Triangle ABC is a right triangle with sides of lengths a, b, and c and a right angle at C. Find the indicated trigonometric function value of A. Rationalize denominators containing radicals.a = 9, b = 7; find sin A.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.If f(x) = 7x + 6 and g(x) = 7x2 - 3x + 5, find (fg)(x) and (fg)(0).
A. 49x3 - 21x2 + 17x + 30; 30 B. 49x3 + 21x2 + 17x + 30; 30 C. 49x3 + 21x2 + 17x; 0 D. 49x2 - 21x + 41; 41
Mathematics