In hawaii, january is a favorite month for surfing since 60% of the days have a surf of at least 6 feet.† you work day shifts in a honolulu hospital emergency room. at the beginning of each month you select your days off, and you pick 6 days at random in january to go surfing. let r be the number of days the surf is at least 6 feet.

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step-by-step explanation:

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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