Which of the following statements correctly uses the distributive property? -2(15 - 3) = -2(15) + (-2)(3)
-3(12 + 5) = -3(12) - (-3)(5)
7(9 - 8) = 7(9) - 8
9(-7 + 6) = 9(-7) + 9(6)

∆red ≅ ∆ by rule will give brainiest if possible

Find the solution(s) to x^2-14+49=0

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables