the product of 8 and the sum of 10 and -7
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It is: 13+x+7x or as 13+8x
Which phrase describes the variable expression 6.w
3n-7
4xz=16
That looks like the description of an EXPRESSION. However, an expression need not have "at least one operation"; a single number, or variable, is a perfectly valid expression.
The expression is 9*x.
It is: 13+x+7x or as 13+8x
17x+(1+x)
Which phrase describes the variable expression 6.w
Assuming you call your number "n", the expression would be "14n". You can replace "n" with whatever variable you want to use.
3n-7
4xz=16
The expression that represents the product of 84 and b is 84b. In mathematical terms, when you multiply a number by a variable, you simply write the number next to the variable without any operation symbol in between. So, 84 multiplied by b is written as 84b.
That looks like the description of an EXPRESSION. However, an expression need not have "at least one operation"; a single number, or variable, is a perfectly valid expression.
A variable is a letter that represents a number. An expression that contains at least one variable is called variable expression, also called algebraic expression. A variable expression has one or more terms. A term is a number, a variable, or a product of numbers and variables. For example,3(x^2)y + 2xy + x - 7 is a variable expression, where you have 4 terms.When working with variable expression, you often use the substitution principle:If a = b, then a may be replaced by b in any expression.The set of numbers that a variable may be represent is called replacement set, or domain, of the variable. To evaluate a variable expression, you replace each variable with one of its values and simplify the numerical expression that results.Example: Evaluate the expression 2x - 4y for x = 5 and y = -9.Solution:2x - 4y= 2(5) - 4(-9)= 10 + 36=46
The number is called the coefficient of the variable
In Algebra a term is either a single number or variable, or numbers and variables multiplied together.