Iam supposed to write 'half of the difference between a and b, where a is bigger than b' as an expression but i don't understand how. can i have an explanation on how and why?

List the sides of δrst in in ascending order (shortest to longest) if: a ∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12°

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

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.