Write an expression for each situation. use t when a variable is needed.show how u got the answer .1.the number of days in t weeks 2.christopher bought 8 more than a dozen eggs. 3.each story of a building is 10 feet tall.the building has t floors.

1)     7t     (7 days in a week and t represents the unknown number of weeks)
2)    t + 8  (more THAN means the plus sign follows the previous number/variable and dozen means 12.)
3)    10t    (10 feet per story, therefore repeated addition is represented as multiplication)

13xy^2-10xy-23=0

you first add the like terms and rewrite and thats how you get the answer