Triangle ABC has side lengths 39, 80, and 89. Do the side lengths form a right triangle? Explain. please water it down for me i cant understand it

Ill mark the brainliest if you me with the these three questions 7,8,9

Worth 15 points handsome jack is buying a pony made of diamonds. the price of the pony is p dollars, and jack also has to pay a 25% diamond pony tax. which of the following expressions could represent how much jack pays in total for the pony? a= p = 1/4 b= p+0.25p c=(p + 1/4)p d=5/4p 0.25p choose 2 answers

The blue lake trail is 11 1/2 miles long.grace has hiked 1 1/2 for 2 hours. how far did she from the end of the trail