Hey could you please make a video about manipulating quadratic and exponential expressions ... when they ask which answer shows something.. as a constant or coefficient... I kinda struggle with that
Hey, thanks for the video. I dont understand the question in 9:26. You said we should use the part/whole stuff to calculate it. I get the Part part but i dont get the whole part. why is the whole part i.e the denominator x+3 why not x+25. Thanks
By part to whole in this scenario, I mean salt solution to total solution. The denominator represents the total solution, which is made up of x liters of the 25% salt solution and 3 liters of the 10% salt solution. That gives us a total of x+3 liters. x+25 doesn't make sense here because 25 doesn't represent the total liters of solution.
Since all of the answers are expressed in terms of q, we'll need to relate t to q. You can set up a proportion as follows: (4 quarters/year) = (q quarters/t years). Cross multiply and solve for t to get t = q/4. I hope this helps!
