A. Find the center and the radius of the circle with the equation:
x2 - 2x + y2 + 4y+ 1 = 0
center: (1,2)
c. center: (1,2)
radius: 4
radius: 2
b. center: (2,-4)
d. center: (1,-2)
radius: 1
radius: 2
Please select the best answer from the choices provided
A

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.