Question

How do you use cross products to solve `s/11=30/110`?

Answer 1

Cross multiply to get `s=3`

Explanation:

We can use the cross multiplication formula.
Following the image's suggestions, we can plug in `s` for `a`, `11` for `b`, `30` for `c`, and `110` for `d`.

We'd multiply `a` and `d`, and `b` and `c`.

`a*d=s*110` and `b*c=11*30`.

`s*110=110s`, and `11*30=330`.

We'd then set the two values equal to each other: `110s=330`. We'd want to get `s` to its simplest form, so divide both sides by `110`.

`(110s)/ 110=s`, and `330/110=3`, so `s=3`.