Subtract.(7x7 + 3x9 - 4 + 3x8) - (-3 + 5x8 + 6x9 + 2x7)
A. -3x9 - 2x8 + 5x7 - 1
B. 9x9 + 8x8 + 9x7 - 1
C. 9x9 + 8x8 + 9x7 - 7
D. -3x9 + 8x8 + 9x7 - 7
Answer: A
Mathematics
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Evaluate the algebraic expression for the given value(s) of the variable(s).3x2 - 8xy - 2y2 ; x = -5, y = -6
A. 43 B. -237 C. -182 D. 129
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Find the unknown number in the proportion. Round answer to the nearest hundredth when necessary.
= 
A. x = 16 B. x = 1.3 C. x = 12 D. x = 126.8
Mathematics