The number of text messages, y (in billions), sent in the United States since 2005 can be modeled using the equation y=18.8(3)x, where x is the number of years after 2005. In what year were there approximately 4.6 trillion text messages sent?

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

y + 11 = (1/4)(x + 16)

step-by-step explanation: