Janelle and three of her friends bought four smoothies of equal cost for a total of 3$. If she purchases the same smoothies on another day for herself and nine of her friends, how much money will she spend?

What properties allow transformation to be used as a problem solving tool

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

If chord ab is congruent to chord cd, then what must be true about ef and eg?