Question

Sydney is cutting the crust from the edges of her sandwich. The dimensions, in centimeters, of the sandwich is shown.

Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?

a) 8x2 + 34; 43.6 centimeters
b) 8x2 + 34; 45.52 centimeters
c) 4x2 + 17; 21.8 centimeters
d) 4x2 + 17; 22.76 centimeters

Answer 1

Answer: B) 8x^2 + 34; 45.52 centimeters

Step-by-step explanation: this answer is 100% correct for edge.nuity

Answer 2

Option b) 8x²+34; 45.52 centimeters

Explanation:

Length of the sandwich is = 2x²+8 centimeters

Breadth of the sandwich = 2x²+9 centimeters

Therefore total perimeter of the sandwich = 2(length + breadth)

= 2 (2x²+8+2x²+9) centimeters

= 2( 4x²+17) centimeters

= (8x² +34) centimeters

If x = 1.2 then perimeter of the sandwich =
`2(4(1.2)^(2)+17)`

= 2(4×1.44+17) = 2(5.76+17)

= 2×22.76 = 45.52 centimeters

So the answer is option b) 8x²+34; 45.52 centimeters