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What is a quadratic expression?
A quadratic expression is an expression which is written in the form ax2+bx+c, where a, b, and c represent constants, x represents a variable, and a is not equal to 0.
What do you call replacing a variable in an expression by a number?
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
What is a type of expression that contains a variable or variables?
An algebraic expression is a type of expression that contains a variable or variables.
What is the difference between a numerical expression and a variable expression?
A variable expression includes variables.
What is a variable expression that has a decreasing value as the value of the variable increases?
what is a variable expression that has a decreasing value as the value of thevariable increases?
Explain how you know to use a variable in an addition or subtraction expression?
that we can use it
What is 100 - 110e?
-10
When a equation uses addition the variable can be solved by subtraction True or False?
True.
What does a letter in an algebraic expression represent?
An unknown variable
What is a good variable expression to represent any integer?
n
Do All expressions contain variables?
No, not all expressions contain variables. An expression is a mathematical phrase that combines numbers, variables, and mathematical operations. A variable is a symbol that represents a quantity that can vary, such as x or y. Some expressions may only contain numbers and mathematical operations, such as addition, subtraction, multiplication, and division. For example, "3 + 5" is an expression that only contains numbers and the addition operation. However, an expression that contains at least one variable is known as an algebraic expression, and this type of expression is commonly used in algebra to represent mathematical relationships between variables. For example, "2x + 4" is an algebraic expression that contains the variable x and represents a linear equation in which y is equal to two times x plus four.
How do you use variables in an addition or subtraction expression?
A variable is simply an unknown value. It can be represented by anything else other than numbers (since they won't be variables). For example, a+1 is a variable in an addition expression, b-c is a subtraction expression with two variables. Expressions need not be made up of only 2 items as well. The next line is a single expression as well: q-w-e-r-t-y-u-i+o+p-a+s+d+f+g-32h+124j+73k-l+z+2x+c+7v-b+4n-8m
When an equation contains addition can the variable be isolated by performing the opposite process namely subtraction?
Yes.
What is the definition for variable?
the def for variable is a letter or symbol used to represent a missing number in an algebrac expression
What algebraic expression for the number of muffins that are left what quantity do you need to represent with a variable?
X+6. Variable (x)
What is the meaning of q in algebra?
It could represent an unknown variable in an expression or an equation.
What is the variable expression to represent the number of pounds in y ounces?
16x
