Supposed that the functions g and h are defined for all real numbers x as follows. g(x) = 2x+1
h(x) = 5x
write the expressions for (g-h)(x) and (g+h)(x) and evaluate (g. h)(-2).

The perimeter of ? cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.