Solve x^2 + 6x + 7 = 0. a) x = −1 and x = −5 b) 3 plus or minus square root of 2 c) negative 3 plus or minus square root of 2 d) quantity of negative 3 plus or minus square root of 2 all over 2

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