Solve the system by the elimination method.7x - 3y = 821x - 9y = 40

A.
B. {(3, 5)}
C. {(8, 40)}
D. ?

Answer: D

Mathematics

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Write the expression as the logarithm of a single quantity.ln (x + 10) - 2 ln x

A. ln 
B. ln [x2(x + 10)]
C. ln [(x + 10) - x2]
D. ln 

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Evaluate the function.f(x) = -4x - 7; f(-2)

A. 4 B. 28 C. 1 D. -7

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Tell whether or not the relation is a function.{(-3,-8), (-1,9), (3,3), (3,5)}

A. Yes B. No

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Perform the addition or subtraction.(6x6 - 7x4) + (4x6 - 9x4 - 6)

A. -4x6 - 3x4 - 6x B. -20x11 C. -6x - 16x6 - 14x4 D. 10x6 - 16x4 - 6

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Mathematics