pre-a chap 5 final

perimeter

100

of a square with sides 5 ft.

20 ft

200

of a rectangle with length 7 ft. & width 4 ft.

22 ft.

300

of a triangle with height 4 ft., base 5 ft. & hypotenuse 3 ft.

12 ft.

400

of a triangle with base 11 ft. & sides 7 ft & 9 ft.

27 ft.

500

if the perimeter of a rectangle is 36 ft. and the length is 12 ft., what is the width?

6 ft.

area

100

of a square with sides 5 ft.

25 ft.²

200

of a rectangle with base 7 ft. and height 4 ft.

28 ft.²

300

of a triangle with base 3 ft, height 4 ft. and hypotenuse 5 ft.

6 ft.²

400

of a triangle with base 11 ft. and height 5 ft.

27.5 or 27 1/2 ft.²

500

the area of a rectangle is 72 ft². the length is 12 ft. what is the width?

6 ft.

variables both sides

100

3x  + 6 = 2x

x = -6

200

10 - x = 9x

x = 1

300

8x + 6 = 4x - 10

x = -4

400

x - 6 = -x + 2

x = 4

500

5 + 2x - 12 = x + 9

x = 16

inequalities

100

x - 3 < 10

x < 13

200

x - 15 < 3

x < 18

300

x + 13 > -22

x > -35

400

-3x < -24

x > 8

500

2/3x > 6

x > 9