7.
what are the coordinates of the center of the circle whose equation is (x – 9)2 + (y + 4)2 = 1?

(−9, 4)

(3, −2)

(9, −4)

(−3, 2)

x-9=0 => x=9

y+4=0 => y=-4

=> (9,-4)

could you reply to this with the question so i can ?

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