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Answer :

The standard form of the following are:

(16)

(17)

(18) squared =

(19)

(20) cubed =

(21)

(22)

(23)

The expression in standard form and their comparison:

(24)

(25)

(26)

(27)

(28)

(29)

Step-by-step explanation :

The standard form of the following are:

(16)

(17)

(18) squared =

(19)

(20) cubed =

(21)

(22)

(23)

The expression in standard form and their comparison:

(24) ____

____

9 ____8

(25) ____

____

343 ___ 343

(26) ____

____

125 ____ 15

(27) ____

____

9 ___ 16

(28) ____

____

____

4 ___ 8

(29) ____

___

____

64 ____ 64

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk