Can somebody give me the answer then explain to me how to get that answer?

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.