Section 4.2

Section 4.4

R7.4 x = -11 or x = -17

Section 4.11

R2.1   none

A55   $300

R7.5 x = 9 or x = -9

A78  535.84 feet

R2.2   5x and -5x

A56   100 boxes

R7.6 y =

A79  781.25 feet

R2.3   5x

A57   3.33 seconds

R7.7 n = 5/3 or n = -1

A80  10.52 feet

R2.4   7xy and -7xy

A58   12.08 feet

R7.8 x = 1 or x = 6

A81  142.22 feet

R2.5   -3

A59   64.8 mph

R7.9 n = -1 or n = 5/3

A82  449.44 feet

R2.6   -3

A60  127.28 feet

R7.10 y = -1/2

A83  19.49 feet

R2.7  

A61   15 feet

R7.11

A.84 342.94 feet

R2.8   9p and -9p

R7.12

R2.9  

Section 4.5

R7.13 n = 0,

R2.10

R5.1

R7.14 x=

R2.11 -5t

R5.2

R7.15 x = 3/7 or x = 2

R2.12

R5.3

R7.16 x = 5 or x = -5

R2.13 none

R5.4  y=1 or y= -1

R7.17

R2.14 2 and -2

R5.5 not possible

R7.18

R2.15

R5.6

R7.19 x =

R2.16

R5.7

R7.20 y = -5/4 or y = 2/5

R2.17 -2

R5.8  

R2.18 0

R5.9 

Section 4.8

R2.19 3x

A62  8 in. and 6 in.

R2.20

Section 4.6

A63  1300 feet

R2.21

R6.1   x= -4

A64  5 in., 12 in., 13 in.

R2.22

R6.2   x = 7 or x = 1

A65  15 feet

R2.23 9

R6.3  x = 3  or  x = -5/2

A66 10 yd., 24 yd., 26 yd.

R2.24

R6.4  m = 0 or m = -5

A67  22.62 cm, 51.23 cm

R2.25

R6.5 x = 6 or x = 2

A68  5.7 inches

R2.26

R6.6  x = -1 or x = -3

A69  12 in., 16in.

R2.27 5

R6.7  x = 7 or x = -7

A70  10 glasses

R2.28 y= -5

R6.8  x= 12 or x = -12

A71  21 cakes

R2.29

R6.9 x = 0, x = 4, or x = -1

A72  7.1 inches

R2.30 -5

R6.10 

A73  3.6 ft., 1.6 ft.

R2.31

A74  496 pools

R2.32

Section 4.7

A75  12 in., 16 in.

R2.33 3y-1

R7.1  x = ¼ or x = -3/2

A76  10m, 24m

R2.34

R7.2  x = 4/3 or x = 5/6

A77  11.75m, 38.24m

R2.35 none

R7.3  x= -14, x = 0, or x=12