Is 1, 7 and 5 a pythagorean triple?

Tamera puts 15/4 gallons of gasoline in her car. which mixed number represents the gallons of gasoline? a) 2 3/4 gallons b) 3 1/4 gallons c) 3 3/4 gallons d) 4 1/2 gallons answer it's worth a lot of points!

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !