Question

A=at+bt solve fot t

Answer 1

A = at + bt
t (a+b) = A
t = A/(a+b)

Answer 2

area of a trapezoid formular A=1/2ah+1/2bh can be used to find the area the area A of a trapezoid with bases a and b and height h,solve for h.

Answer 3

pls show working

Answer 4

chess rating;the formula R=rt-400[w-l]/n is used to establish a chess players rating r after that player has played N games won W of them and lost L of them.here r is the average rating of the opponents.solve for l
pls show working.