The ratio of rainy days to non rainy days was 2 to 3. how many of the 30 days in april were rainy?

(30/(2+3))2=12

So there were 12 rainy days in April.

check...

If there are 2:3, rainy to non-rainy there are 5 equal parts of magnitude:  30/5=6

So each part is equal to 6.  So 6*2=12 rainy days and 6*3=18 non-rainy days.

W= woman's age
g= grandson's age

CURRENTLY
The woman's age (w) equals five times that of her grandson's age (g).

w= 5 * g
w= 5g

FUTURE
The woman's age (w) equals four times that of her grandson's age (g) plus the twelve years.

w= 4g + 12

ANSWER: A linear system that models this situation is w= 4g + 12.

Hope this helps! :)