The function y = 5.45 + 1.05(x + 7) can be used to determine the cost in dollars for a prepaid cell phone plan of x minutes. What is the rate of change of the cost, in dollars, with respect to the number of minutes purchased?

20 ! need which shows a difference of squares? 10y^2-4x^2 16y^2-x^2 8x^2-40x+25 64x^2-48x+9

Given the graph below state whether or not the relation is a function, and give the domain and range.

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