The diagram shows a rectangle ABCD.
AC = (3x + 2.5) cm and BD = (5x - 6.5) cm. Find DF.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y

One file clerk can file 10 folders per minute. a second file clerk can file 11 folders per minute. how many minutes would the two clerks together take to file 672 folders?