Wally owns a car that travels 350 miles on 13.1 gallons of gas. how many miles per gallon does it achieve?

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Tomas is making trail mix using granola and walnuts. he can spend a total of $12 on the ingredients. he buys 3 pounds of granola that costs $2.00 per pound. the walnuts cost $6 per pound. he uses the equation to represent the total cost, where x represents the number of pounds of granola and y represents the number of pounds of walnuts. he solves the equation for y, the number of pounds of walnuts he can buy. answer- b tomas added 6 to both sides of the equation instead of subtracting 6. just took the test

How to write four times a number,minus 6,is equal to theee times the number+8 as an equqtion