Triangle DEF is rotated 180 degrees about the origin to form triangle D'E'F'.What are the coordinates of the vertices of triangle D'E'F'? D' (–1, –4); E'(–2, –1); F'(–1, –5)

D' (4, 1); E'(1, 2); F'(5, 1)

D' (1, –4); E'(2, –1); F'(5, –1)

D' (4, –1); E'(1, –2); F'(1, –5)

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.

Multiplying fractions by whole number 5 x 1/3=?