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d) 4(s + 4.5) and (s + 4.5) + (s + 4.5) + (s + 4.5) + (s + 4.5)

Step-by-step explanation:

since  you know that one side is (s+4.5) and a square has 4 congruent sides the answer would be 4(s + 4.5) and (s + 4.5) + (s + 4.5) + (s + 4.5) + (s + 4.5)

The correct answer is D

Step-by-step explanation:

Step one :

The perimeter of a square is the sum of all four sides given a side as

(s+4.5)+(s+4.5)+(s+4.5)+(s+4.5)

Or

Step 2:

(s+4.5)+(s+4.5)+(s+4.5)+(s+4.5)

Opening bracket we have

s+4.5+s+4.5+s+4.5+s+4.5

Summing all "s'" terms

(4s+18)

4(s+4.5)

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

$113.42

i hope that is right.

step-by-step explanation: