Question

Bianca makes and error when she tries to write an expression equivalent to 12 + 15(3 - y) - 10y. What is the error? Fix Bianca’s error.

Answer 1

The multiplication (15(3 - y)) should be done before the addition (12 + 15(3 - y)). To fix this error, we can add parentheses to specify the correct order of operations: 12 + (15(3 - y)) - 10y.

Explanation:

The correct order of operations is as follows:

Parentheses: Expressions within parentheses should be evaluated first.

Exponents: Exponents should be calculated next.

Multiplication and division: These operations should be performed from left to right, working from left to right.

Addition and subtraction: These operations should be performed from left to right, working from left to right.