Write the equation of the circle in standard form. Find the center and radius. Then sketch the graph.x2 + y2 + 4y - 0 = 0

A. (x + 2)2 + y2 = 4
(h, k) = (- 2, 0), r = 2

B. x2 + (y - 2)2 = 4
(h, k) = (0, 2), r = 2

C. x2 + (y + 2)2 = 4
(h, k) = (0, - 2), r = 2

D. (x - 2)2 + y2 = 4
(h, k) = (2, 0), r = 2


Answer: C

Mathematics

You might also like to view...

Draw the graph of the equation.x2 - 8x - 4y + 32 = 0

A.

B.

C.

D.

Mathematics

Solve the problem.Suppose that sales of a particular brand of appliance satisfy the relationship  where y represents the number of sales in year x, with  corresponding to 1992. What does the ordered pair  mean in the context of the situation? 

A. In 2005, sales of the appliance were 5860. B. In 2005, sales of the appliance were 11,880. C. In 2005, sales of the appliance were 11,800. D. In 2005, sales of the appliance were 5940.

Mathematics

Find zw or  as specified. Leave your answer in polar form.z = 10(cos 30° + i sin 30°)w = 5(cos 10° + i sin 10°)Find zw.

A. 15(cos 40° + i sin 40°) B. 15(cos 300° + i sin 300°) C. 50(cos 300° + i sin 300°) D. 50(cos 40° + i sin 40°)

Mathematics

Indicate what must be done to each side of the equation in order to isolate the variable.-x = 0.46

A. Multiply by -0.46
B. Divide by 0.46
C. Divide by -1
D. Multiply by 

Mathematics