The temperature was -5oF and then fell 8oF.

The temperature increased by 13 degrees Farenheit.

Step-by-step explanation:

8 - (-5) = 13

Imagine we have a number line we start at -5 then add 5 to get to zero and then 8. We went up 13 spaces, since 5+8 equals 13.

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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