1 over 3b = 4 over 5. Which of the following equals b in this equation? 2 2/5
1 1/8
2/5
1/4

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Find the balance at the end of 4 years if 1000 is deposited at the rate of

All per-unit concepts rely on ratios, meaning, to provide a type of measurement