How do i do this scale factor problem? my teacher doesn’t teach.

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°

Juanita wade's new car has an msrp of $28,902.11 including title and processing fees. the premier package which includes surround sound and dvd player costs three times the amount of the in-style package which includes leather seats and select wheels. the total cost of her new car was $34,290.08 which included the 6.5% sales tax. find the cost of the premier package to the nearest cent.