Practice: Formulas

These web-based activities were developed, during summer sessions from 1997 through 1999, by students at Mainland High School, located in Daytona Beach, FL. As part of Mainland's CCTT grant, the students were given permission by the book's publisher to convert the ancillary materials of the County's adopted Algebra 1 textbook (Glencoe Algebra 1 — ISBN: 9780028253282) into html format.

Practice
FORMULAS

Formulas are equations that state rules about relationships.

A = LW	Area of a rectangle = Length times Width
P = 2L + 2W	Perimeter of a rectangle = (2 x length) + (2 x width)
D = RT	Distance traveled = rate x time traveled
C = NP	Cost = number of items x price per item

Complete each statement with a variable expression

1.	A rectangle has width 6 units and length x units. Its area is ____ square units.
2.	A rectangle has widh y and length 14. Its perimeter is ____ .
3.	You travel for (t - 2) hours at 75 miles/hour. You travel ____ km.
4.	You buy (m + 5) bagels at 35 cents each. The cost is ____ cents.
5.	Al earns (p + 3) dollars per hour. In 8 hours he earns ____ dollars.
6.	Our house is y years old. Four years ago it was ____ years old.
7.	The Golden Gate Bridge was built n years ago. Three years from now it will have been standing ____ years.
8.	A sports arena was d years old 15 years ago. It is now ____ years old.
9.	Nine years from now Fenway Park will be g years old. It is now ____ years old.
10.	Mike jogs for half an hour at y miles an hour. He jogs ____ miles.
11.	Workers on an assembly line produce (x + 10) cars each day. In 5 days they produce ____ cars.
12.	A conveyer belt moves at n yds./min. In 10 minutes it moves ____ yds.
13.	I drove for three hours at r miles/hour. How far did I go? ____
14.	Dick drove for h hours at 85 km/hour. How far did he go? ____
15.	Pencils cost p¢ each. How much will 5 pencils cost? ____
16.	Yogurt costs 75¢ per container. How much will x containers cost? ____
17.	Sketch a rectangle having length 1 and width 5. What is its area? ____
18.	Sketch a rectangle having length 7 and width w. What is its perimeter? ____
19.	Pencils cost p¢ each and notebooks cost n¢ each. How much will 3 pencils and 2 notebooks cost? ____
20.	Shirts cost $20 each and ties cost $12 each. How much will s shirts and t ties cost? ____