Arectangular lot with a 50-ft frontage and a 230-ft depth sold for $8625. find the cost of the lot per square foot

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 $

Find the quotient. 50a2 – 98b2 -5a +7b

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22