0
Sure you can substitute that. You just have to be careful to avoid division by zero - but the same may happen with other numbers as well. For example:
- If you have a denominator "x", then you can't substitute "x" by zero.
- If you have a denominator "x - 1", then you can't substitute "x" by 1, because if you do, the denominator will be zero.
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What is y-5 -5?
0
How do you write -8 increased by the quotient of 13 and a number as variable expression?
-8 + 13/N, where N ≠0.
What is 20 plus 40x divided by 20x and are there any restrictions on the variable?
1/x + 2, provided x is not 0. If x is 0, the expression is undefined.
Can a term in an algebraic expression be zero?
Yes they can, for example quadratic expressions are often written in the form, ax^2+bx+c, where x is a variable, and a,b,c are constants. If you have an expression such as 5x^2 - 3, then clearly a=5, c=-3 and b=0
What is the difference between no solution and undefined?
undefined means you can not do the operation (5/0 is undefined) no solution refers to an equation not having an answer. a solution is a number which you can plug into the variable of an equation and get a true statement. So having no solution means there is no number which you can plug in and get a true statement. As a fraction is not an equation, but an expression it is not right to say that 5/0 has no solution. There is no variable in 5/0, nothing to plug into to get a true or false statement.
What is y-5 -5?
0
Explain how to find restrictions on the variable in a rational equation?
Substitute the variable in the denominator for a value that will make the denominator have a value of 0 or an imaginary number
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.
In the exponential expression a raise to negative n is a positive integer the variable a cannot be equal to zero Explain why this is so?
a^(-n) = (1/a)^nIf a is 0, the above expression would require division by 0, which is not defined.
How do you write -8 increased by the quotient of 13 and a number as variable expression?
-8 + 13/N, where N ≠0.
Is a expression the number multiplied to a variable?
An expression can be that, but it can also be a combination of such terms and other mathematical operations. For example, 3a + 27b^2/sin(27c) provided c is not 0.
What is 20 plus 40x divided by 20x and are there any restrictions on the variable?
1/x + 2, provided x is not 0. If x is 0, the expression is undefined.
What is the difference between a numerical expression and a algebraic expression?
Numerical expressions solely include numbers, while algebraic expressions may contain a variable like x. An example of a numerical expression is 1+2 and an example of an algebraic expression is 2x+3y=0.
What are the properties of z in a normal distribution?
Z is a variable with mean 0 and variance 1.Z is a variable with mean 0 and variance 1.Z is a variable with mean 0 and variance 1.Z is a variable with mean 0 and variance 1.
Why do you substitute 0 for y when finding the x-intercept?
So that you have an equation = to 0 and can manipulate it in one variable. Y = 2 X - 4 2X - 4 = 0 2X = 4 X = 2 check the graph and see that this is true. Works for all such functions.
How can you determine from an equation if the line will pass through the origin?
For any polynomial equation, there must be no constant term.For equations in general there is no easy way. Substitute 0 for each of the variables and if the resulting expression is 0 then the line passes through the origin.
Can a term in an algebraic expression be zero?
Yes they can, for example quadratic expressions are often written in the form, ax^2+bx+c, where x is a variable, and a,b,c are constants. If you have an expression such as 5x^2 - 3, then clearly a=5, c=-3 and b=0
