Use the net to find the surface area of the prism
6ft 11ft 6ft 11ft 8ft

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

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this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x