Question: please solve and explain 8. Solve the following Linear System using Substitution: y= -3x + 10 Show your work! (15) 2x - 5y = 86

please solve and explain

8. Solve the following Linear System using Substitution: y= -3x + 10 Show your work! (15) 2x - 5y = 86 The point of intersection is 9. Solve the following Linear System using Elimination: 3x - 4y = 4 Show your work! (/5) 5x + 2y = 50 The point of intersection is 10. The number of cases of a virus, N, in a region that has just over 1/2 million people, is estimated at 50, and is growing at an exponential rate, according to the formula shown, where t is time, in days. Solve an equation, to estimate how long it will take for 10% of the region to be infected, which is 51 200 cases. (/3) Show your work! N = 100 (25) 11. You have decided that you can afford to "put away" $300/mo, to save for a time close to retirement. If you find an investment that offers 5%/a, compounded monthly, (/4, /2) a) How much will your investment be worth in 40 years? First, show these calculations: (Round to the nearest dollar.) i = FV PMT (1+1)0 -1 n = b) How much interest will you have earned? Show your calculation

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