Given the measures of the sides of a triangle below, which set could form a right triangle?
A. 6, 7, 8
B. 9, 12, 15
C. 12, 15, 20
D. 20, 25, 30

(give a brief explanation please)

14. (05.02 lc) what is the value of y in the solution to the following system of equations? (5 points) 2x + y = −4 5x + 3y = −6

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance

What are the domain and range of f(x)= -log5(x+2)