ASAP What is 7 · 2 3/7 ?

Are carpet coast $15 per square metre. the total delivery charge is $21 peter buys n squared metres of carpet what is the expression which represents the total cost in $

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Which part of a 2-column proof is the hypothesis of the conjecture? a) given b) reasons c) prove d) statements ! i think it's b but i'm not quite