Unit 4. Day 22.

Example A: Write an equation. Then solve the equation. Ms. Ritter grew up on a small farm in S. Indiana. When she was in 7th grade, her allowance depended on how much produce she helped sell. Her allowance was $5, but she received an extra $2 for every melon she sold. If she needed at least $ 54, how many melons did she need to sell? 5 2 ∙ 𝑚 54 + ≥ 5+2𝑚≥54 −5 −5 2𝑚 ≥ 49 2 2 𝑚 ≥ 24.5 𝑚𝑒𝑙𝑜𝑛𝑠 24.5

Example B. : Amy got $65 for her birthday Example B*: Amy got $65 for her birthday. She gets a babysitting job and can save $20 each week. How many weeks will it take her until she has at least $649 for a new iphone 7? 65 + 20 ∙ 𝑤 ≥ 649 65+20𝑤≥649 −65 −65 20𝑤 ≥ 584 2 9 . 2 20 20 20 5 8 4 4 . − 4 0 584 20 1 8 𝑤 ≥ − 1 8 0 4 𝑤 ≥ 29.2

198 −4 ∙ 𝑚 140 < 198−4𝑚<140 −4𝑚 < −58 −4 −4 58 4 −198 −198 Example C*: Write an equation. Then solve the equation. Matt is trying to loose weight. Matt is currently 198 pounds. If he is dieting and exercising and can lose 4 pounds each month, how many months will it take him to get down to less than 140 pound?? 198 −4 ∙ 𝑚 140 58 4 < 198−4𝑚<140 −198 −198 2∙29 2∙2 −4𝑚 < −58 −4 −4 29 2 58 4 𝑚 > 14 1 2 𝑚>14.5

Example D. : Jaslyn goes to the mall with €50 Example D*: Jaslyn goes to the mall with €50. She spends €13 on lunch and then goes to buy a bunch of scarfs. The scarfs are on sale for €8 each. How many scarfs can she buy? 13 + 8 ∙ 𝑠 ≤ 50 −13 −13 4 . 6 2 5 8𝑠 ≤ 37 8 3 7 . 8 8 − 3 2 5 − 4 8 ≤ 4.625 𝑠 2 − 16 4

Example E*: Write an equation. Then solve the equation. Julie Jordan (Mr. Jordan’s mom) wants to call her son. She has Verizon, and they charge $5 per month and $0.07 each minute. If she wants to spend no more than $15 per month on calling her son, how many minutes can she talk per month? 5+0.07𝑚≤15 . −5 −5 1 4 2 8 7 1 0 0 0 . 0 0 0.07𝑚 ≤ 10 − 7 0.07 0.07 3 − 28 . 2 10 0 07 1000 7 − 𝑚 ≤ 14 . 6 𝑚 ≤ 142.8