Find the solution to the equation below? x^2-4=0

x=±2

Step-by-step explanation:

x^2-4=0

Add 4 to each side

x^2-4+4=0+4

x^2 = 4

Take the square root of each side

sqrt(x^2) = sqrt(4)

x=±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

step-by-step explanation: