Write the quadratic function in the standard form y = a(x - h)2 + k.y = x2 + 10x
A. y = (x - 5)2 + 5
B. y = (x + 10)2 - 100
C. y = (x - 10)2 + 10
D. y = (x + 5)2 - 25
Answer: D
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Solve.A cabin cruiser travels 20 miles in the same time that a power boat travels 40 miles. The cruiser travels 5 mph slower than the power boat. Find the speed of each boat.
A. Power boat travels 15 mph and cruiser travels 10 mph. B. Power boat travels 20 mph and cruiser travels 15 mph. C. Power boat travels 10 mph and cruiser travels 5 mph. D. Cannot be determined with information given.
Solve the problem.A firm is considering a new product. The accounting department estimates that the total cost, C(x), of producing x units will be C(x) = 50x + 4540.The sales department estimates that the revenue, R(x), from selling x units will be R(x) = 60x,but that no more than 648 units can be sold at that price. Find and interpret (R - C)(648).
A. $1102 profit, income exceeds cost It is worth it to develop product. B. $75,820 profit, income exceeds cost It is worth it to develop product. C. $1940 profit, income exceeds cost It is worth it to develop product. D. -$1940 loss, cost exceeds income It is not worth it to develop product.
Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are positive.(9x1/5 ? y1/5)2
A. 81x2/5y2/5 B. 81x1/25y1/25 C. 81x2y2 D. 81x1/10y1/10
Find the requested equation.The system of equations 
= y - 3xy 
= -x + 5xy describes the influence of the populations (in thousands) of two competing species on their growth rates. Find an equation relating x and y, assuming y = 4 when x = 1.
A. 5y - ln y = ln x - 3x - ln 4 + 17 B. 5y - ln y = ln x - 3x - ln 4 + 23 C. 5y - ln y = ln x - ln 4 + 23 D. 5y - ln y = -3x - ln 4 + 17