(18+4i)+(−11+23i)=left parenthesis, 18, plus, 4, i, right parenthesis, plus, left parenthesis, minus, 11, plus, 23, i, right parenthesis, equals Express your answer in the form (a+bi)(a+bi)left parenthesis, a, plus, b, i, right parenthesis.

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

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