For the given system of equations, which method would be the most efficient method to use when solving the system of equations: substitution, addition, or either?x + y = 124x + 9y = 41
A. addition
B. substitution
C. either
Answer: C
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Collect like terms.5.1y2 - 1.7y - 3.4y2 + 5y + 2.4y2
A. 10.9y2 + 3.3y B. 4.1y2 - 1.7y + 5 C. 4.1y2 + 3.3y D. 4.1y2 + 6.7y
Find the equation that the given graph represents.
A. P(x) = 2x6 + 9x3 - 7x2 + 4x - 16 B. P(x) = -2x5 + 7x4 + 9x3 - 40x2 + 4x + 16 C. P(x) = -x6 + 7x5 - x2 - 2x + 16 D. P(x) = x5 + 7x4 - x3 - 40x2 + 2x + 16
Solve the problem.The cost C, in dollars, to produce graphing calculators is given by the function C(x) = 55x + 3500, where x is the number of calculators produced. How many calculators can be produced if the cost is limited to $119,000?
A. 1900 calculators B. 2227 calculators C. 2380 calculators D. 2100 calculators
Solve the equation by dividing each side by the coefficient. Simplify.n ? 45 = 12
A. n = 
B. n = 
C. n = 
D. n = 540