Find the value of x that makes m ∥ n.

How many solutions does the nonlinear system of equations graphed below have?

Find the rate at which the water is now flowing from the tap give your answer cubic centimetres per second

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.