The mass of a pound coin is 8.75 g (correct to 2 decimal places). The mass of a 20 pence coin is 5.00 g (correct to 3 significant figures).

What is the mass of £5.40 worth of coins* to a suitable degree of accuracy, in grams?

(*using the least possible number of coins)

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

The legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.