The circle below is centered at the point (-1, 2) and has a radius of length 3. What is its equation?
A. (x+ 2)2+(y- 1)2 = 3^2
B. (x+ 1)2 + (y-2)2 = 9
C. (x - 2)2 + (y + 1)2 =3^2
D. (x-1)2 + (y + 2)2 = 9

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x