Assuming you mean y = 7.80x + 40: This has infinitely many solutions, and it is already solved for "y". If you substitute ANY value for "x", you can calculate the corresponding value for "y".
It means you replace each instance of the given variable with the given value. For instance, you have the following equation: A(A+2A)= B Then someone says to "substitute the value '4' for each instance of 'A'. You'd just replace them, and get: 4 ( 4 + 2(4)) = B
You substitute the value of the variable into the quadratic equation and evaluate the expression.
Substitute the first of the ordered pair wherever x appears in the equation and the second value wherever you have y. Evaluate the equation. If it is true, then the point is on the line and if not, it is not.
You substitute the variable for its value. Or you substitute the variables for each of the values.
For a value to be a solution to an equation, when you substitute the value for the variable, the equation becomes true. 4+B=6 B is the variable. 2 is the solution Substitute 2 for B 4+2=6 The equation is true.
when you find the value, you SOLVED the equation. you CHECK the equation when you substitute the value in the variables place and check that the equation is true.
Substitute that value in the equation, and then check to see if the resulting statement is TRUE.
You substitute the value of the variable into the equation and simplify. If the rsult is a true statement then that value of the variable really does satisfy the equation.
If you found the value of x that is a solution to an equation, you want to substitute that value back into the original equation, to check that it indeed satisfies the equation. If it does not satisfy the equation, then you made an error in your calculations, and you need to rework the problem.
Assuming you mean y = 7.80x + 40: This has infinitely many solutions, and it is already solved for "y". If you substitute ANY value for "x", you can calculate the corresponding value for "y".
It means you replace each instance of the given variable with the given value. For instance, you have the following equation: A(A+2A)= B Then someone says to "substitute the value '4' for each instance of 'A'. You'd just replace them, and get: 4 ( 4 + 2(4)) = B
You substitute the value of the variable into the quadratic equation and evaluate the expression.
Substitute the variable in the denominator for a value that will make the denominator have a value of 0 or an imaginary number
Substitute the first of the ordered pair wherever x appears in the equation and the second value wherever you have y. Evaluate the equation. If it is true, then the point is on the line and if not, it is not.
You substitute the variable for its value. Or you substitute the variables for each of the values.
The y-intercept is the value of a function f when x is equal to zero. So, substitute 0 for x into the equation and find the value of y.