How do you put -10(4x-5) into a equeation like 40x-50

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

Multiply. write your answer in simplest form. 3/8 x 5/7

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x