Find an equation for the circle with the given center C and radius r.Center (0, 0), radius 9
A. x2 + y2 = 9
B. x2 + y2 = 18
C. x2 - y2 = 9
D. x2 + y2 = 81
Answer: D
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Solve the system of equations by the addition method. If the system does not have a single ordered pair as a solution, state whether the system is inconsistent or dependent. x + 9y = 312x + 9y = 26
A. No solution, inconsistent B. (-4, -5) C. (5, 3) D. (-5, 4)
Find the indicated function value.Find f(-3) when f(x) = 2x + 18.
A. 12 B. -24 C. -4.2 D. 24
Solve the problem using the information given in the table and the last- in, first-out inventory method. Round dollar amounts to the nearest cent.Determine the unit costs for units in the ending inventory. 57 units are in the ending inventory from the units that were purchased first. Beginning inventory: 90 units at $33.82 March 8: 70 units at $28.11 June 10: 65 units at $37.51 August 12: 40 units at $21.08
A. First purchases: 57 units @ $28.11 per unit B. First purchases: 57 units @ $33.82 per unit C. First purchases: 57 units @ $21.08 per unit D. First purchases: 40 units @ $33.82 per unit
Solve.Elaine has a grassy patch of land on her farm that is a rectangle measuring 20 feet by 50 feet. So her goat can eat grass while Elaine is busy with other farm work, she drove two posts into the ground and fastened a rope to each post, passing the rope through a metal ring on the goat's collar. When the goat pulls on the rope while walking, its path is an ellipse. (See the figure.) If the goat can just reach all four sides of the rectangular patch, find the equation of the elliptical path.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1