Question

If c varies directly as d-3, and if c=16 when d=7, find c when d=10

Answer 1

To find the value simply observe the ratio between the values of c and d.

C = d - 3

16 = 7 - 3

16 = 4.

C = 10 - 3

C = 7

I believe C would be 19, as this would be a similar value that would be added to 4 to get to 7 as C would need to have as well.