Solve.The equation y = 0.004x - 0.20 can be used to determine the profit y, in dollars, of producing x items. How many items x must be produced so the profit will be at least $1965?
A. {x? x ? 491,200}
B. {x? x ? 491,300}
C. {x? 0 < x ? 491,299}
D. {x? x ? 490,300}
Answer: B
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Provide an appropriate response.A student thinks that the expressions (x + y)2 and x2 + y2 are equal to one another. How would you explain to the student why this is not so.
What will be an ideal response?
Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation.-5x - y - 9z = -64-7x - 5z = -37 8y + z = 46
A. {(-1, 5, 2)} B. {(1, 6, 5)} C. ? D. {(1, 5, 6)}
Evaluate the terms of the sum using the given information.x1 = 4, x2 = -5, x3 = 2, x4 = -2, and ?x = -0.6; f(x) = 3x2 - x
A. -26.4 - 48 - 6 - 8.4 B. 44 + 80 + 10 + 14 C. 14.4 - 18 + 7.2 - 7.2 D. 18.4 + 22 + 5.2 + 2.8
If y varies inversely as x, find the inverse variation equation for the situation.y = 9 when x = 
A. y = 
B. y = 27x
C. y = 
D. y = 