Which set of side lengths form a right triangle? a.10 cm, 6 cm, 8 cm b.3 ft, 6 ft, 5 ft c.14 m, 20 m, 25 m. d.7 cm, 8 cm, 10 cm

A

Step-by-step explanation:

To form a right triangle, the legs of a triangle must satisfy the Pythagorean theorem: . We will test each triangle using a as the smallest side, b as the next smallest and c as the largest side.

A.

This is a right triangle.

B.

This is not a right triangle.

C.

This is not a right triangle.

D.

This is not a right triangle.

536

step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!