Evaluate:
5x2 – 2 (y + 1) + 9 when x = 2 and y = 1.

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

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

Do,h = (7, 9) (14, 18) the scale factor is