b) Solve by factoring: x + 3x = 18 c) Use quadratic formula to solve for x, give exact answers. 2x-3x = -4 a) Quadratic Equation: b) The two solutions to this equation are: Use part b) to state how many units are needed to get $300 in profits? 4. The profit for a product is given by P(x) = -x + 35x + 500 dollars, where x is the number of units produced and sold. a) Set up a quadratic equation and b) solve it to find out how many units must be produced and sold to have a profit of $300. Show all calculations and round to nearest whole number. x: Age (yrs) y: Sleep (hrs) 15 6 5. Sketch a scatterplot from the data shown in the table, then determine whether there is a linear or a quadratic relationship between the inputs and outputs Then find the regression model.. 25 Regression equation: y = 20 5.8 6 * 30 6.2 3b) 35 6.6 What type of function could best model this data set? (Linear or Quadratic?). 3c) (round to nearest whole unit) Scatterplot