7th Grade Math

Extra Practice EP23

Extra Practice

Multi-Part Lesson 8-3 (continued)

PART C PAGES 464–465

Use the act it out strategy to solve each problem.

1. STAIRS Lynnette lives on a certain floor of her apartment building. She
   goes up two flights of stairs to put a load of laundry in a washing machine
   on that floor. Then she goes down five flights to borrow a book from a
   friend. Next, she goes up 8 flights to visit another friend who is ill. How
   many flights up or down does Lynette now have to go to take her
   laundry out of the washing machine?


2. LOGIC PUZZLE Suppose you are on the west side of a river with a fox,
   a duck, and a bag of corn. You want to take all three to the other side
   of the river, but...

• your boat is only large enough to carry you and either
  the fox, duck, or bag of corn.


• you cannot leave the fox alone with the duck.


• you cannot leave the duck alone with the corn.


• you cannot leave the corn alone on the east side of the
  river because some wild birds will eat it.


• the wild birds are afraid of the fox.


• you cannot leave the fox, duck, and the corn alone.


• you can bring something across the river more than once.
  If there is no other way to cross the river, how do you get
  everything to the other side?

PARTS D E PAGES 466–471

1. SURVEYS The table shows the results Cookie Number
   Chocolate chip 49
   Peanut butter 12
   Oatmeal 10
   Sugar 8
   Raisin 3

of a survey of students’ favorite cookies.

Predict how many of the 424 students

at Scobey High School prefer chocolate

chip cookies.

2. VACATION The circle graph shows the
   
   'PSFJHO
   DPVOUSZ
   
   0UIFS
   
   .PVOUBJOT



#FBDI



"NVTFNFOU

QBSL

Vacation Survey

results of a survey of teens and where

they would prefer to spend a family

vacation. Predict how many of

4,000 teens would prefer to go to

an amusement park.

3. TRAVEL In 2000, about 29% of the foreign visitors to the U.S. were from
   Canada. If a particular hotel had 150,000 foreign guests in one year, how
   many would you predict were from Canada?

EP2_EP36_ExtPract_M1_895130.indd EP23 1/6/10 11:46 AM