3.7 Using Formulas

Use one of your formulas to help

you answer the following question.

 

Write your equations on a separate

sheet of paper.

 

Number the problems.

Show your work in solving.

Did you read the directions?  yes or no?

1.    The area of a rectangle is 24 in2, with a

length of 8 in.  What is the width?

 

(place the abreviated label in the second box)

width =

2.    The area of a triangle is 18 m2 and the

base is length is 4 m.  What is the height

of the triangle?

 

(place the abreviated label in the second box)

height=

3.    A rectangular building has a length

of 20 yds and a width of 15 yds.  What is the

perimeter of the building?

 

(place the abreviated label in the second box)

 

 

perimeter =
distance =

4.    Tom ran a race at 6 miles per hour for

3.5 hours.  How far did he run?

 

(place the abreviated label in the second box)

5.    A plane traveled a distance of 1350 miles.

It was flying at 450 miles per hour.  How long

was the plane flying?

 

(place the abreviated label in the second box)

time =

6.    The perimeter of a rectangle is 36 cm.

The length of the rectangle is 10 cm.  What is

the width?

 

(place the abreviated label in the second box)

width =

7.     Review:  Solve for y:

 

4x + 2y= 20

 

8.  Review:  Solve for y

 

 

7x - y = 9

9.  Review:  Solve for y

 

 

12 = 8x - 2y

8.  Review:  Solve the eqaution.

 

 

2(x + 4) = 3x - 8

x =
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