1 / 7

Warm-Up

Warm-Up. Dave bought 7 tacos and 3 burritos for $36. For the same price he could have bought 2 tacos and 6 burritos. How much do both tacos and burritos cost?. Let T – Cost of Tacos. B – Cost of Burritos. T =. $3. B =$5.

mtirrell
Download Presentation

Warm-Up

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Warm-Up Dave bought 7 tacos and 3 burritos for $36. For the same price he could have bought 2 tacos and 6 burritos. How much do both tacos and burritos cost? LetT – Cost of Tacos B – Cost of Burritos T = $3 B =$5

  2. CA Standards 9.0: Students solve a system of two linear equations in two variables algebraically and are able to interpret the answer graphically. Students are able to solve a system of two linear inequalities in two variables and to sketch the solution sets. Objective: (1) Students will solve word problems using systems of equations. Agenda: 12/06/2011 1.) Warm-up 2.) Lesson: Word Problems – Cost Quantity (ppt.) 3.) Class/Home Work One (1) Assignment 4.) STAY ON TASK!!!!

  3. 8.4 Word Problems – Cost/Quantity Notes: Word Problems Type: Cost Quantity Ex 1) A local record company sells CDs for $15 and DVDs for $20. If they made $170 while selling 10 items, how many of each did they sell? LetC – # of CDs 15C + 20D = 170 15C + 20D = 170 D – # of DVDs –15D = -150 -15 -15C = 10 C + D 5D + 0 =20 5 5 4 D = C + D = 10 C + (4) = 10 -4 -4 C = 6

  4. 8.4 Word Problems – Cost/Quantity Try this one: Ex 2) A local record company sells CDs for $10 and DVDs for $18. If they made $188 while selling 14 items, how many of each did they sell? LetC – # of CDs 10C + 18D = 188 10C + 18D = 188 D – # of DVDs –10D = -140 -10 -10C = 14 C + D 8D + 0 =48 8 8 6 D = C + D = 14 C + (6) = 14 -6 -6 C = 8

  5. 8.4 Word Problems – Cost/Quantity Notes: Word Problems Type: Cost Quantity Ex 3) Burritos cost $5 and tacos cost $3. How many of each did I buy if I got 8 items for $36? LetB – # of Burritos 5B + 3T = 36 5B + 3T = 36 T – # of Tacos – 5T = -40 -5B = 8 B + T -5 – 2T 0 =-4 -2 -2 2 T = B + T = 8 B + (2) = 8 -2 -2 B = 6

  6. 8.4 Word Problems – Cost/Quantity Try this one !!!!! Ex 4) Burritos cost $3 and tacos cost $1. How many of each did I buy if I got 21 items for $53? LetB – # of Burritos 3B + 1T = 53 3B + 1T = 53 T – # of Tacos – 3T = -63 -3B = 21 B + T -3 – 2T 0 =-10 -2 -2 5 T = B + T = 21 B + (5) = 21 -5 -5 B = 16

  7. 8.4 Word Problems – Cost/Quantity Notes: Word Problems Type: Cost Quantity Ex 5) A child’s ticket costs $8 for admission into the movie theater. Adult tickets cost $12. How many of each did a family get if they spent $48 for 5 tickets? LetC – # of Child tickets 8C + 12A = 48 8C + 12A = 48 A – # of Adult tickets – 8A = -40 -8C = 5 -8 C + A 4A 0 + =8 4 4 2 A = C + A = 5 C + (2) = 5 -2 -2 C = 3

More Related