If it cost $60 for 10 students to go on field trip and $70 for 20 student to go on field trip and it cost$80 for 30. how much would it cost for 40 students and 50 students to go on a field trip.

Fawn bought a total of 70 cakes for a tea party. she spent $3,025. fawn bought vanilla cakes for $22 each and a fruit filled cake for $55 each. the system of equations below can be used to find the number of vanilla cakes, v, and the number of fruit filled cakes, f, fawn purchased. which system of equations has the same solution as the system below.