Write a ratio that can be expressed in no waze terms as 3: 4

Combined megan and kelly worked 60 hours. kelly worked twice as many hours as megan. how many hours did they each worked?

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Square a has a side length of (2x-7) and square b has a side length of (-4x+18). how much bigger is the perimeter of square b than square a?and show all work! you so