Evaluate the expression for the given values. If necessary, round to the nearest tenth.3x + 7y + 8; x = 2, y = 9
A. 49
B. 74
C. 77
D. 21
Answer: C
Mathematics
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Solve the problem.A circular pond is being installed in the corner of a yard, as shown. The installer needs to know the value of x in feet. Find x to the nearest tenth of a foot. 
?a = 47 ft
A. 55.1 ft B. 55.3 ft C. 54.7 ft D. 54.4 ft
Mathematics
Decide whether the statement is true or false.For every counting number x, x ? 1 or x = x2.
A. True B. False
Mathematics
Find the exact value of the trigonometric function.cos 
A. - 
B. - 
C. 
D. 
Mathematics
Solve.The ratio of the weight of an object on Earth to the weight of the same object on Pluto is 100 to 3. If a buffalo weighs 3588 pounds on Earth, find the buffalo's weight on Pluto. (Round to the nearest pound.)
A. 10,764 lb B. 1,076,400 lb C. 8 lb D. 108 lb
Mathematics