Suppose your final grade in this class is determined by the following: test average 50%, Final Exam 20%, Homework/classwork 15%, Class Participation 15%. You have scored the following: on tests: {75, 82, 90, 75}Homework: {90, 100, 75, 87, 63}Class Participation: {90}. What do you have to make on the Final Exam to have AT LEAST an 85 in this class? A) 90
B) 92
C) 94
D) 96

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

With this one. will mark brainliest

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10