Simplify.(3a)2
A. 9a2
B. 6a
C. 6a2
D. 9a
Answer: A
Mathematics
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Solve the problem.A jet plane moving at constant speed travels 1000 miles with the wind and then 1200 miles against the wind. If the speed of the wind is 50 mph and the total flight takes 5 hours, find the speed of the plane.
A. 100 mph B. 450 mph C. 400 mph D. 500 mph
Mathematics
Tell whether the expression is a monomial. If it is, name the variable(s) and coefficient, and give the degree of the monomial.-2xy7
A. Monomial; variables x, y; coefficient -2; degree 1 B. Monomial; variables x, y; coefficient -2; degree 7 C. Monomial; variables x, y; coefficient -2; degree 8 D. Not a monomial
Mathematics
Multiply and simplify.
? 
A. 5m
B. 
C. 
D. 10
Mathematics
Find the determinant.det 
A. -168 B. -176 C. 160 D. 168
Mathematics