Solve the problem.The school bake sale sold a total of 26 plates of brownies and slices of cake and collected a total of $102.50 for the sales. They sold 12 more plates of brownies than slices of cake. How many plates of brownies and slices of cake were sold?
A. 
plates of brownies and 
slices of cake
B. 7 plates of brownies and 19 slices of cake
C. 
plates of brownies and 
slices of cake
D. 19 plates of brownies and 7 slices of cake
Answer: D
Mathematics
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and the plane 
A. 
?
B. 
?
C. 
?
D. 
?
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Find at least three nonzero terms [including a0, at least two cosine terms (if they are not all zero) and at least two sine terms (if they are not all zero)] of the Fourier series for the given function.f(x) = 
A. f(x) = 
+ 
B. f(x) = 
+ 
C. f(x) = 
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A. True B. False
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