Perform the indicated operations and simplify.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: D
Mathematics
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Simplify the expression, and combine like terms.7(10a2 + 3ab) - a(3a - 2b)
A. 73a2 + 23ab B. 67a2 + 19ab C. 73a2 + 3ab - 2b D. 67a2 + 23ab
Mathematics
Solve the system of equations.y + 5z=21-3x + y+ 2z =12-2x+ 2z =10
A. (-1, 1, 4) B. (1, 2, 6) C. (-1, -4, 5) D. (1, 3, 6)
Mathematics
Find the specified domain.For f(x) = 8 
and g(x) = 4x + 10, what is the domain of f ? g?
A. (-?, -3] B. [3, ?) C. [-3, ?) D. [-2, ?)
Mathematics
Rewrite with only sin x and cos x.sin 2x - cos 2x
A. 2 sin2 x - 2 sin x cos x + 1 B. 2 sin2 x - 2 sin x cos x - 1 C. 2 sin x D. 2 sin2 x + 2 sin x cos x - 1
Mathematics