Find the missing coordinate to complete the ordered pair for the equation 3x-4y=12

Find an equation for the linear function which has slope -10 and x-intercept -7

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?

Write the equation in logarithmic form 8^x=64