If 4x-3y=10 what is the value of 12x-9y

Marina baked cookies. she gave 3/4 of the cookies to the scout bake sale. she shared the remaining 6 cookies with her friends. how many cookies did marina bake?

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)