thank u for helping me !

6. Solve each rational equation algebraically. If necessary, round final answers to two decimal places. 4 a) 5 x+4 x-3 b ) - x-3 x-5 1 2 = c) = 3 x+2 x+l x x x+1 +1 7. Find the solution set for each inequality. a) 24 b) -2 3 12 -31-10 x-3 d) (x-1)(x+3) x-3 x+3 c) 1+4 > 0 (x-2)' SO 8. Estimate the instantaneous rate of change of each function at the given point. a) f(x) = x+3 , where x = 4 b) f (x) = -3x x- 2 x-+1 where X = -211. A biologist finds the average production in which cancerous cells are produced in rats is given by P(t) = 12 - 21+1 where I is measured in hours and P() is measured in 1000 cells per hour. Estimate the rate at which the average production is changing at 4 hours. 12. The student council bought pizza for $900 to sell at the dance. They kept 10 pizzas to feed the grade reps after the dance and sold the rest for $1040. There were 8 slices in each pizza. Their profit was 50 cents a slice. How many pizzas were in the original order