The larger of two numbers is 10 more than three times the smaller number. The larger number decreased by the smaller number is 80. What are the two numbers?

I need help getting the answer and I need all my questions answered by tomorrow

1. suppose that scores on a knowledge test are normally distributed with a mean of 71 and a standard deviation of 6. a. label the curve: show the mean and the value at each standard deviation: b. if angelica scored a 76 on the test, what is her z-score? (draw her score on the curve above and label) c. what percent of students did angelica score higher than? how can you tell? d. if 185 students took the test, how many students scored higher than angelica?