1. On Desk: 1. Pencil 2. Math Journal 3. Learning Log 4.Last night’s HW - ? Learning Log: 1. HW: MSA p. 75, #30, 31, 34, 37 2. Quiz Thurs. 12/10 3. Test Thurs. 12/17 Math CC7/8 – Be Prepared

2. Last night’s HW – Questions? Warm Up Finish 3.5 D-E: Equations & Inequalities Begin HW? Tasks for Today

3. Warm Up 4(x + 4) = 6x + 1813x + 10 = 9x -22 Solve the equations below and check your solution.

5. Expenses = Income 825 + 3.25n = 8.20n - 3.25n - 3.25n 825 = 4.95n 4.95 4.95 166.67 = n (cakes) Does this answer make sense? What answer would make more sense? Fabian’s expenses will equal his income when he sells about 167 cakes. (166 isn’t enough!)

6. Break-Even Point or “point of intersection” How do you find the break-even point from a table? – Look for when the x and y values for both variables are equal to each other. How do you find the break-even point from a graph? – Look for where the two lines intersect. How do you find the break-even point from an equation? – Set the two equations equal to each other and solve.

7. E < 2,400 825 + 3.25n < 2,400 -825 3.25n < 1,575 3.25 3.25 n < 484.6 Fabian needs to make 484 cakes or less to keep the expenses less than $2,400.

8. I > 2,400 820n > 2,400 820 820 n > 292.7 Fabian needs to make 293 cakes or more to keep the income greater than $2,400.

9. Yes, these statements make sense. She is simply substituting the income and expense expressions for the variables I and E.