What is the answer step by step to this equation 3(-3-3xx)=-9x-4

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

Select the lengths in centimeters that would form a right triangle

∆red ≅ ∆ by rule will give brainiest if possible