Algebra I Aim: How Can We Use Equations to Solve Problems? HW: Writing Equations Day 1 WS

Transcription

1 Algebra I DO NOW Bart, Milhouse, and Martin are saving money to buy a rare comic book. Milhouse saved $10 less than Bart. Martin saved $5 more than Bart. Who should it be? Why? a) Define your variable: Let x = b) Write three expressions (including the variable defined above) to represent how much each boy saved. 1

2 Bart, Milhouse, and Martin are saving money to buy a rare comic book. Milhouse saved $10 less than Bart. Martin saved $5 more than Bart. Why Bart? a) Define your variable: Let x = b) Write three expressions (including the variable defined above) to represent how much each boy saved. 2

3 WHAT S IN A NAME PROJECT Project Due Dates Due Monday, Nov 21 Rough draft of letter to Juliet is due (primera copia de la carta a Julieta) Tomorrow we will work on this in class. Nov 30 Poster with final draft of letter/process sheets due (Poster con la ultima copia de tu carta y el proceso) Dec 13 Present project at Panels (presente proyecto) 3

4 Every Tuesday and Thursday Room 202A (Art Room) *Test Corrections* *Correcciones de prueba* Sign up by the calculators to come Thursday (limited slots) Hoja de registro por la caja de la calculadora para venir martes o jueves (ranuras de tiempo limitado) Bring your notes and review sheet to help you Traiga sus notas para ayudarle 4

5 Bart, Milhouse, and Martin together saved $100 to buy a comic book. Milhouse saved $10 less than Bart. Martin saved $5 more than Bart. How much money did each boy save? Verbal Equation: Write a verbal equation (figure out what equals what) 5

6 Bart, Milhouse, and Martin together saved $100 to buy a comic book. Milhouse saved $10 less than Bart. Martin saved $5 more than Bart. How much money did each boy save? Bart's Money + Milhouse's money + Martin's money = Total Amount Saved Step 1: Step 2: Step 3: Step 4: Step 5: Define your variable explicitly Write expressions using your variable Write an equation using your expression Solve your equation Answer the question Let x = Amount of $ Bart Saved x x 10 x + 5 Amount Bart Saved Amount Milhouse Saved Amount Martin Saved 6

7 Ex. 2 The product of a number and 3 increased by 5 is 7 less than twice the number. What is the number? Before we begin write our equation, what are the key terms that will tell us what math operations we should use in our expressions? Step 1: Step 2: Step 3: Step 4: Step 5: Define your variable explicitly Write expressions using your variable Write an equation using your expression Solve your equation Answer the question 7

8 As a Class? With a Partner? Ex. 3 On an algebra test, the highest grade was 42 points higher than the lowest grade. The sum of the two grades was 138. What is the lowest grade? Step 1: Step 2: Step 3: Step 4: Step 5: Define your variable explicitly Write expressions using your variable Write an equation using your expression Solve your equation Answer the question 8

9 Ex. 3 On an algebra test, the highest grade was 42 points higher than the lowest grade. The sum of the two grades was 138. What is the lowest grade? 9

10 What steps should we take to write and solve an equation given a word problem? 10

11 Get a head start on your Homework!!! mathsims.wordpress.com Lesson Slides, Resources and More! 11