Formulas are equations that state rules about relatinships

FORMULAS

Formulas are equations that state rules about relatinships

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 cents each. How much will 5 pencils cost? ____
16.	Yogurt costs 75 cents 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 cents each and notebooks cost n cents 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? ____