Simplify the expression.-2(10r + 4) + 10(7r + 2)
A. 8r + 2
B. 50r + 4
C. -28r
D. 50r + 12
Answer: D
Mathematics
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Use the power rule and the power of a product or quotient rule to simplify the expression.
3
A. 
B. x3y3
C. 
D. 
Mathematics
Subtract.(-2x7 + 2x9 - 4 + 2x8) - (-2 - 4x8 + 4x9 - 6x7)
A. -2x9 - 2x8 - 8x7 - 6 B. 6x9 - 2x8 - 8x7 - 6 C. -2x9 + 6x8 + 4x7 - 2 D. 6x9 - 2x8 - 8x7 - 2
Mathematics
Solve the equation.y3 - y = -5y2 + 5
A. {25} B. {1, - 5, 5} C. {-5, 5} D. {-1, 1, - 5}
Mathematics
Solve the system by substitution.
A. (-13, 0), (12, 5), (12, -5) B. (-13, 0), (12, 25), (12, -25) C. (12, 5), (12, -5) D. empty set
Mathematics