At a local store with a “no tax” sale, robert bought 7 dvds and 5 cds for $95.50 before tax. michael bought 3 dvds and 4 cds for $49.75 before tax. if william has $80 to spend, which one of the following purchases could he make ?

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.