Twice the quantity of nine less than a number x

Question

Math Test Study guide Cant understand Have gone to multiple websites need help thanks

Answer 1

Twice the quantity of nine less than a number x

 

twice the quantity of (nine less than a number x)

 

2(nine less than a number x)

 

2(x - 9)

Answer 2

Among mathematicians the term "quantity" indicates that what follows is to be treated as a single expression.

Twice the quantity translates to: 2(        ).

None less than a number translates to x - 9.

 

Put together

2(x - 9)

Answer 3

First, let's focus in on what is meant by "number x" This is an algebra problem, so it might help to try to build your expression (mathematical sentence without an equal sign) starting with x. Let "x" represent itself as an unknown number.

 

In the problem, it says "nine less than a number x" which means that something is being taken away from the x so that is smaller. "nine less" indicates subtraction ("less") and nine is how much less. So now the expression looks like: x-9

 

When you see "quantity" used in math, it can mean the amount or it could mean ( ), which it does here. So "the quantity of nine less than a number x" is: (x-9). Now we're really close! "Twice the quantity" means 2 times what in in the parentheses.

 

Therefore, the expression is 2•(x-9) or 2(x-9)

 

 

 

 

 

Answer 4

You would set up an algebraic equation that demonstrates a number minus 9. Then, you want "twice" that number, so multiply by 2. 

2(x-9)