Please help and show working out of the screenshot below thank you

The diagram shows a 7cm by 6cm rectangle based pyramid. all the diagonal sides - ta, tb, tc and td are length 10cm. m is midpoint of rectangular base. work out height mt to 1 decimal place

Which system of linear inequalites is represented by the graph?

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?