Evaluate the expression x - y for the given values of the variables.x = -5.2, y = 0.55
A. 5.75
B. 4.65
C. -5.75
D. -4.65
Answer: C
Mathematics
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Perform the indicated operation and express in lowest terms.
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A. 
B. 
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D. 
Mathematics
Solve the problem.In 1995 the United States recovered 24% of its municipal solid wastes through recycling, up from 17% in 1990. Let y represent the percentage recycled and x the number of years since 1990. Find a linear equation that fits this data.
A. y = 1.4x + 17 B. y = -1.4x + 7 C. y = 1.4x + 24 D. y = 0.7x - 17
Mathematics
Simplify the expression.
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A. 
B. 
C. 
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Mathematics
Factor the polynomial f(x). Then solve the equation f(x) = 0.f(x) = x3 + 4x2 - 9x - 36
A. (x + 3)(x - 3)(x + 4) ; -3, 3, -4 B. (x - 3)(x + 3)(x - 4) ; -3, 3, -4 C. (x - 3)(x + 3)(x - 4) ; 3, -3, 4 D. (x + 3)(x + 3)(x - 5) ; 3, -3, 5
Mathematics