Ayudenme porfavor son muchos puntacos los que te llevas xd ayuda​

Acamper leaves camp on a kayak and travels 50 miles east on a river, then he ties his kayak to the bank and travels 20 miles north on a bicycle. this trip can be plotted on the coordinate plane, where the camp is the point (0, 0). the distant of the camper to the camp can be found using the distance formula. which other formula can he use? a) 502 - 202 b) 502 + 202 c) 502 - 202 d) 502 + 202

Math it's appreciated. (picture provided)

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83