Find the center (h, k) and radius r of the circle. Graph the circle.x2 + 8x + y2 + 6y + 23 = 0
A. (h, k) = (-4, -3); r =
B. (h, k) = (4, 3); r = 2
C. (h, k) = (-4, -3); r = 2
D. (h, k) = (4, 3); r =
Answer: A
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Solve the problem.The value, v, in hundreds of dollars, of Juan's television is approximated by where t is the number of years since he first bought the television. Graph the equation and use the graph to estimate the value of the television 6 years after it was purchased.
A. $780 B. $600 C. $1200 D. $300
Solve the problem.During a laboratory experiment, a student found that the melting point of her unknown substance was 86°C. Find the corresponding Fahrenheit temperature. Round to the nearest tenth, if necessary.
A. 65.6°F B. 186.8°F C. 212.4°F D. 30°F
Express the number in terms of i.-
A. i
B. - i
C.
D. -22i
Solve the formula for the specified variable.P = 2L + 2Wfor L
A. L =
B. L =
C. L = P - 2W
D. L = P - W