10. At 2:00 PM, a thermometer reading is 80°F is taken outside where the air temperature is 20°F. At 2:03 PM, the temperature reading yielded by the thermometer is 42°F. Later, the thermometer is brought inside where the air is at 80°F. At 2:10 PM, the reading is 71F. When was the thermometer brought indoors?
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
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