Combine like terms. -5x - 3x +7x Question 5 options: 15x -x x 9x 6 (1 point) Question 6 Unsaved Combine like terms. x + x + x - 10x Question 6 options: 7x -7x 13x -13x 7 (1 point) Question 7 Unsaved Combine like terms. 8t - 9t + 4t - 12t Question 7 options: -9t -7t 33t 17t 8 (1 point) Question 8 Unsaved Simplify the expression by combining any like terms: x + 4x - 6y + 7y Question 8 options: 5x - 13y 5x - y 6xy 5x + y 9 (1 point) Question 9 Unsaved Simplify the expression by combining any like terms: 3ax + 3x + 5ax - x + 5a + 10ax Question 9 options: 18ax + 4x + 5a 18ax + 2x + 5a 15a + 5ax 6a + 10ax 10 (1 point) Question 10 Unsaved Simplify the expression by combining any like terms: 4m + 6mn - 2m - 2mn + 7m Question 10 options: 9m + 4mn 13m + 4mn 9m + 8mn 9m - 4mn