What is 12 less than a number?

What is 12 less than a number?

12 less than a number means to subtract 12 from that number. So, 12 less than 20 is 8 , because is 20−12 , 12 less than 12 is 0 , because it’s 12−12 , and so on.

What is a variable in math?

variable, In algebra, a symbol (usually a letter) standing in for an unknown numerical value in an equation. Commonly used variables include x and y (real-number unknowns), z (complex-number unknowns), t (time), r (radius), and s (arc length).

Which of the following is the correct algebraic expression of twelve less than the product of three and a number?

The phrase less than suggests subtraction, and the word product suggests multiplication. So, the verbal expression twelve less than the product of three and a number can be written as the algebraic expression 3n – 12.

Why do inequalities change when multiplying by a negative number?

Because we are multiplying by a negative number, the inequalities change direction . And that is the solution! But to be neat it is better to have the smaller number on the left, larger on the right.

How do you translate the quotient of twice a number T and 12?

How do you translate “the quotient of twice a number t and 12” into a mathematical expression? Let’s translate the expression: “the quotient of x and y ” means that we will have to divide the numbers: x y In this case, x is described as “twice a number t “.

How do you write greater than or less than a number?

If a is greater than b, then a > b. If a is less than b, then a < b. Standard Form. The standard form to represent the greater than or less than the number is given as: Greater Than: First number > Second Number. Example: 7 > 5. Less Than: First Number < Second Number. Example: 3 < 7

Do you have to divide by 2 to solve inequalities?

Do not try dividing by a variable to solve an inequality (unless you know the variable is always positive, or always negative). First, let us clear out the “/2” by multiplying both sides by 2. Because we are multiplying by a positive number, the inequalities will not change.