Write an expression or equation to represent each of the following:
1.) The sum of a number and nine is 15
2.) Seventeen diminished by five.
3.) Twice the sum of a number and two is twenty two
4.) Half of the sum of a number and three is six
5.) Ten added to the product of six and two
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Answer:
5
Step-by-step explanation:
In the problem above, the variable g represents the number of groups in Ms. Jensen's class. A variable is a symbol used to represent a number in an expression or an equation. The value of this number can vary (change). Let's look at an example in which we use a variable.
Example 1: Write each phrase as a mathematical expression.
Phrase Expression
the sum of nine and eight 9 + 8
the sum of nine and a number x 9 + x