Find the equation of the circle that satisfies the following conditions. Express the final equation in the form x2 + y2 + Dx + Ey + F = 0.Tangent to the x axis, a radius of length 2, and abscissa of center is –1
A. x2 + y2 - 2x - 4y + 1 = 0 and x2 + y2 - 2x + 4y + 1 = 0
B. x2 + y2 + 2x - 4y + 1 = 0
C. x2 + y2 + 2x - 4y + 1 = 0 and x2 + y2 + 2x + 4y + 1 = 0
D. x2 + y2 + 2x + 4y + 1 = 0
E. x2 + y2 - 2x + 4y + 1 = 0
Answer: C
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Solve the problem.John Forgetsalot deposited $100 at a 3% annual interest rate in a savings account fifty years ago, and then he promptly forgot he had done it. Recently, he was cleaning out his home office and discovered the forgotten bank book. How much money is in the account?
Fill in the blank(s) with the appropriate word(s).
Find the product.(x - 2.2)(2x + 0.2)
A. 2x2 + 4.2x + 0.44 B. 3x2 + 4.2x - 2 C. 2x2 - 4.2x - 0.44 D. 3x2 - 4.2x + 2
Calculate 
.v = 
A. 
B. 65
C. - 
D. -
Solve the radical equation, and check all proposed solutions.
= 7
A. {121} B. {45} C. {53} D. {49}