Find an equation for the circle.Center at (-1, -4), radius 

A. (x + 4)2 + (y + 1)2 = 25
B. (x - 4)2 + (y - 1)2 = 25
C. (x - 1)2 + (y - 4)2 = 5
D. (x + 1)2 + (y + 4)2 = 5


Answer: D

Mathematics

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Find the product.(8x + 5y)2

A. 64x2 + 25y2 B. 64x2 + 80xy + 25y2 C. 8x2 + 80xy + 25y2 D. 8x2 + 25y2

Mathematics

Solve the problem.Stevie bought a stereo for $230 and put it on sale at his store at a 60% markup rate. What was the retail price of the stereo? Round to the nearest cent if necessary.

A. $368.00 B. $268.00 C. $330.00 D. $460.00

Mathematics

Simplify. Be sure to rationalize the denominator. Assume that all variables represent positive real numbers.

A.
B.
C.
D. 5

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Solve the problem.Zippy golf carts obey the demand equation p = - x + 2000. The cost of producing x golf carts is given by the function C(x) = 100x + 5000. a) Express the revenue R as a function of x. b) Express the profit P as a function of x. c) Find the value of x that maximizes profit. d) Find the maximum profit.

A. a) R(x) = - x2 + 2000x
b) P(x) = - x2 + 1900x - 5000
c) 9500
d) $9,020,000.00
B. a) R(x) = x2 + 2000x
b) P(x) = x2 + 1900x - 5000
c) 9950
d) $28,800,250.00
C. a) R(x) = - x2 + 2000x
b) P(x) = - x2 + 1900x - 5000
c) 9500
d) -$5000.00
D. a) R(x) = - x2 + 2000x
b) P(x) = - x2 + 1900x + 5000
c) 9500
d) $9,030,000.00

Mathematics