Solve the problem.An airplane is sighted at the same time by two ground observers who are 3 miles apart and both directly west of the airplane. They report the angles of elevation as 15° and 
How high is the airplane? Round to the nearest hundredth of a mile.
A. 1.17 mi
B. 2.18 mi
C. 3.29 mi
D. 0.78 mi
Answer: B
Mathematics
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The solution(s) to the equation x + 5 = x + 4 is/are 
.
A. unlike terms B. no solution C. all real numbers D. reversed
Mathematics
Find the perimeter of the following.A square measuring 9.03 cm on a side.
A. 81.54 cm B. 18.06 cm C. 36.12 cm D. 46.12 cm
Mathematics
Perform the indicated operations and simplify the result. Leave the numerator and denominator in your answer in factored form.
A. x - 4
B. x + 4
C. 
D. 
Mathematics
Find the indicated set.Let U = Universal set = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}, A = {2, 4, 5, 6, 9}, B = {1, 3, 5, 8, 9} and C = {1, 4, 5, 9}.Find 
A. {5, 9} B. {1, 2, 3, 4, 5, 6, 7, 8, 9} C. {0, 1, 2, 3, 4, 6, 7, 8} D. {0, 7}
Mathematics