Based on past experience, a caterer knows the ratio of the number of glasses of juice to the number of people at the party should be 3: 1. if 15 people are coming to the party, how many glasses of juice should the caterer have ready?

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

the answer is (-4,-4)

hope this ! : d