Linear or nonlinear

x 1 2 3 4 5
y 1 8 27 64 125

is it linear or non linear

Atriangle has sides with lengths of 10 yards, 13 yards, and 18 yards. is it a right triangle?

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer