Solve.A painter is going to apply a special coating to a triangular metal plate on a new building. Two of the side measures are 11.8 m and 5.7 m. She knows that the angle between these sides is 23.2°. What is the area of the surface she plans to cover with the coating? Round to the nearest square meter.
A. 31 m2
B. 13 m2
C. 33 m2
D. 11 m2
Answer: B
Mathematics
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Use the given substitution to solve the equation.6x6 + x3 - 7 = 0, u = x3
A. ±
, ±1, ±-
B. -
, 1
C. ±1
D. -
, 1
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Perform the row operations on the matrix and write the resulting matrix.Replace R2 by 
R1 + 
R2 
A. 
B. 
C. 
D. 
Mathematics
Find the perimeter of the rectangle or square.Length = 10 ft, width = 4 ft
A. 28 ft B. 14 ft C. 12 ft D. 16 ft
Mathematics
Find the linear factorization of the polynomial and find all roots of the polynomial. f(x) = x4 + 9x2
A. f(x) = x2(3x + i)2, roots: 0, ± i B. f(x) = x2(x + 3i)2, roots: 0, -3i C. f(x) = x2(x + 3i)(x - 3i), roots: 0, ± 3i D. f(x) = x2(3x + i)(3x - i), roots: 0, ± 3i
Mathematics