# ALGEBRA

ON FRIDAY THE TEMPERATURE REACHES A HIGH OF 21 DEGREES ABOVE 0, AND A LOW OF 4 DEGREES BELOW 0. WHAT IS THE DIFFERENCE BETWEEN THE HIGH AND LOW TEMPERATURES FOR FRIDAY?

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1. put these two points on a number line
one is four to the left of zero and the other is 21 to the right of zero
so
the total distance between them is 21 + 4 = 25

or write
21 - (-4) = 21 + 4 = 25

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posted by Damon
2. Friday's high temperature was -1 Celsius. the low temperature was -5 Fahrenheit. what was the difference between the high and low temperatures

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3. 25

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