1 / 14

140 likes | 337 Views

Drill. Lenny’s Lawncare purchased a new truck for 30x + 42 dollars. One year later the value of the truck was 12x + 28 dollars. Write an expression to represent the amount that the truck’s value decreased.

Download Presentation
## Drill

**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

**Drill**• Lenny’s Lawncare purchased a new truck for 30x + 42 dollars. One year later the value of the truck was 12x + 28 dollars. Write an expression to represent the amount that the truck’s value decreased. • Brian bought a new drill for d dollars. He paid 5% sales tax. Write an expression to represent the total amount Brian paid for the drill. • At JFK live, the student ticket price is p dollars and the non-student price is $2.75 more. There were 75 student tickets sold and 34 non-student tickets sold. Write an expression to represent the total ticket sales in dollars.**Lesson 3.4: Solving Multi-step Equations**Solving problems by working backwards Solving equations involving more than one operation**Working Backwards**• Starting at the end of the problem and undo each step • Other strategies:**Solve the following problem by working backwards**• Danny took some rope with him on his camping trip. He used 32 feet of rope to tie his canoe to a log on the shore. He then gave ⅓ of the remaining rope to some fellow campers who also needed to tie a canoe. The next night, he used half of the remaining rope to secure the his tent during a thunderstorm. On the last day, he used 7 feet as a fish stringer to keep the fish he had caught. After the camping trip, he had 9 feet of rope left. How much did he have at the beginning?**Inverse operations**multiplication by an integer division by an integer /5 X 5 division by an integer multiplication by an integer /5 X 5 multiplication by an fraction multiplication by its reciprocal X 1/4 X 4/1 addition subtraction + 6 - 6 subtraction addition - 6 + 6**Use a table to organize**He used 7 feet as a fish stringer 9 feet + 7 feet = 16 feet He used half of the remaining rope to secure the tent 16 feet X 2 = 32 feet He gave 1/3 of the rope to fellow campers 32 feet X 3/2= 48 feet which means he kept 2/3 of the rope He used 32 feet of rope to tie his canoe 48 feet + 32 feet = 80 feet**Tips for success when solving multi-step equations…**• “Undo” the operations in reverse of the order of operations (P, E, M/D, A/S) • So, we always start with A/S first, then move on… • Whatever you do to one side of the equation, you have to do to the other side. • Why? It’s like a see-saw; if you add more onto one side, the see-saw will be unbalanced!**Solve Using Addition and Division**• Solve 5q – 13 = 37. Then check your solution. • 5q – 13 + 13 = 37 + 13 • 5q = 50 • 5q/5 =50/5 • q = 10 • Check 5(10) – 13 = 37; 50-13 = 37 add 13 to both sides simplify divide both sides by 5 simplify**Solving Using Subtraction and Multiplication**• s/12 + 6 = -1 • s/12 + 6 – 6 = -1 -6 • s/12 = -7 • 12(s/12 = -7) • 12s/12 = 12(-7); s = -84 • Check: -84/12 + 6 = -1; -7 + 6 = -1 subtract 6 from both sides simplify multiply each side by 12 simplify**Solving Using Multiplication and Subtraction**Check please! Multiply both sides by -3 Subtract 8 from both sides simplify simplify**Now YOU try a few!**1. 3x + 6 = 36 2. 3 + = 6 3. 7 + 6x = -5**Vocabulary**• Consecutive integers: integers in counting order, ex: 1, 2, 3, 4… or n, n+1, n+2…. • Consecutive ODD integers • 1, 3, 5… • n, n+2, n+4…. • Consecutive EVEN integers • 2, 4, 6…. • n, n + 2, n + 4…. Notice that you can use the same expression to represent either odd OR even; you just need to define the value of n to be even or odd at the beginning!**Find three consecutive odd integers whose sum is 57**Let n = the first odd integer n+2 = the second odd integer n+4 = the third odd integer n + (n + 2) + (n + 4) = 57 3n = 51 3n + 6 -6 = 57 - 6 3n = 51 3 3 n = 17 n + 2 = 19 n + 4 = 21 3n + 6 = 57**Exit Pass**• Turn to page 145 in your book. Please complete the following problems on a separate piece of paper to turn in: 5-11 (odd) • Homework: page 146, 22-39. Work MUST be shown.

More Related