Look at each problem. Then decide if it is an equation or an expression. Check all the equations. A number decreased by three is seven. 9 + n the product of a number and eleven The quotient of a number and six is two. x – 5 = 21

1. Equation

2. Expression

3. Equation

4. Equation

Step-by-step explanation:

To decide whether the given problems are an equation or an expression.

An equation is of the form:

LHS (Left Hand Side) expression = RHS(Right Hand Side) expression

Let us have a look at each problem one by one:

1. A number decreased by 3 is 7.

Let the number be

As per the given statement:

Therefore, is an equation.

2. 9+n the product of a number and eleven.

Let the number be

As per the given statement:

No equal to sign, so it is an expression.

3. The quotient of a number and 6 is 2.

Let the number be

As per the given statement:

Therefore, it is an equation.

4.

Therefore, it is an equation.

d. is the correct answer

step-by-step explanation: