Juan added a set of parentheses and a set of brackets in the expression: 15: 3 x 5 + 4 x 8. Juan's expression has a value of 40. What is one way Juan could have written the grouping symbols?

Step-by-step explanation:

First of all, let us have a look at the rule for solving brackets/parentheses/algebraic operations.

The rule states that the expression must be solved in the following order:

B - Brackets (Innermost parentheses first, then the enclosing brackets are solved)

O - Of (for example 10% of 20)

D - Divide operation

M - Multiplication operation

A - Addition operation

S - Subtraction operation

So, we need to add a set of parentheses i.e. () and a set of brackets i.e. [] in the expression:

such that the result is 40.

Consider the expression:

Let us try to solve the expression using the above rule:

First of all, the innermost () will be solved:

Now, the expression becomes:

Now, 15:15 will be solved as 1

Now, the outer [] will be solved:

Hence, the correct answer is:

a

step-by-step explanation:

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