Question

How do you write “triple the sum of a number and 4 “as an expression?

Answer 1

Hint: Break down the information given to you to try and identify what algebraic expression must look like.
You should always know what you are dealing with –
A sum= this means that you are adding something, so you are doing to use the + sign;
Of a number= this means that you are dealing with a variable. The most common notation for a variable is x or n.

Complete step-by-step answer:
When we combine numbers and variables in a valid way, using operations such as addition, subtraction, multiplication, division, exponentiation, and other operations and functions as yet unlearned, the resulting combinations of mathematical symbols is called a mathematical expression.
The “sum of a number and $ 4 $ ” means ADD them:
 $ \to x + 4 $
Triple that means multiply by 3
 $ \to 3\left( {x + 4} \right) $
Note that this is different from.
“The sum of triple a number and 4” which would be
 $ 3x + 4 $
So, the correct answer is “ $ \to 3\left( {x + 4} \right) $ ”.

Note: An expression is a sentence with a minimum of two numbers and at least one math operation. This math operation can be addition, subtraction, multiplication, and division.
A math expression is different from a math equation. An equation will always use an equivalent (=) operator between the two numbers.
It is not a surprise that variables act like pronouns, because math is basically its own language, defined by numeric and logical rules.
The structure of defining math expression advances in different grades. In early grades, children were expected to write math expressions using numbers and operators. Later on words help students to form a math expression.