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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
To evaluate a variable expression you must do what to values for the variable?
You must substitute values for the variable.
What is an expression that is a number and a variable or a product of a number and one or more variables?
In Algebra a term is either a single number or variable, or numbers and variables multiplied together.
What is an expression with variable?
It is an expression that has some letters or symbols which can take a different values.
An expression that contains at least one variable is called a?
An expression that contains at least one variable is called an algebraic expression. Algebraic expressions consist of variables, constants, and mathematical operations such as addition, subtraction, multiplication, and division. These expressions can be simplified or evaluated by substituting specific values for the variables. Algebraic expressions are fundamental in algebra and are used to represent mathematical relationships and solve equations.
What is a symbolic expression?
A symbolic expression is a mathematical expression or equation containing variables, which represent unknown or variable values. These expressions are often used to represent relationships between different quantities or to describe patterns.
What is arithmetic expression . mention different types of arithmetic expressions?
An expression that represents a numeric value. Other types of expressions can represent character or Boolean values.
What do letters and number represent in Microsoft Excel?
They can represent values in cells. They also can represent columns (letters) and rows (numbers).
What does it mean to evaluate an expression?
To evaluate an expression is nothing but to operate the given expression according to the operators given in the expression if it is evaluable i.e, it could be convertable.
If a binary number needs to represent 16 different values how long must the number be in bits?
4 bits
Which of the following is true about 1 bit Can represent decimal values 0 and 9 Can be used to represent one character in the lowercase English alphabet Represents one binary digit Four binary?
Neither of the following are true about 1 bit, it can not represent decimal values 0 and 9 nor can it be used to represent one character in the lowercase English alphabet and one binary digit four binary. A true statement would be that 1 bit is represented by the decimal values 0 or 1.
What is the quoitent of 12 and a number?
This expression is expressed as 12 / x where x is any number. You select a variable and then, set up the expression. Since we have a quotient of two values, you are dividing the numbers altogether.
What is the answer called in a equation?
The answer in an equation is called the "solution." It is the value or values that satisfy the equation, making both sides equal when substituted into the expression. In the case of equations with multiple variables, the solution may represent a set of values.
What expression is 4xy?
The expression (4xy) represents a monomial where 4 is the coefficient and (xy) is the product of the variables (x) and (y). It indicates that the value of the expression is obtained by multiplying 4 by the values of (x) and (y). This expression is often used in algebra to represent relationships in equations or to describe quantities in various mathematical contexts.
What is the y-intercept of the line represented by the equation below y-2x-1?
-1
If a binary number needs to represent 10 different values how long must the numbers be in bits?
4
What is the difference between 7 less than a number and 7 is less than a number?
7 less than a number is an algebraic expression. Given the number the expression can be evaluated. 7 is less than a number is a statement in the form of an inequality. It is true for some values of the number and not for others.
