Mathematics

Guest

12 February, 09:24

Two students were given the expression shown to simplify.

Use the drop-down menus to complete the statements about whether each student's answer is an equivalent expression. Then choose an expression that is equivalent.

9 - (3-6x)

Sergio: 9 - (-3x)

Sergio's expression is (correct or incorrect) because (he should multiply before subtracting, he should subtract 9-1 first, he cannot simplify 3-6x, he correctly simplified inside of the parenthesis first, he did not multiply multiply 3 by - 1 correctly, or, or he distributed correctly).

Leon: 9+3+6x

Leon's expression is (incorrect or correct) because,

(he should multiply before subtracting, he should subtract 9-1 first, he cannot simplify 3-6x, he correctly simplified inside of the parenthesis first, he did not multiply 3 by - 1 correctly, or he distributed correctly).