960
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There are 1760 yards in one mile. Therefore, 3 miles 320 yards is equal to 3 x 1760 = 5280 + 320 = 5600 yards.
320 = 2x^2 + 12x 0 = 2x^2 +12x -320 Using the quadratic formula x = (-12 + sqr(144+4*2*320))/4 and x= (-12 - sqr(144+4*2*320))/4 x =( -12 + sqr(2560))/4 = 9.649 to 3 d.p. and x=(-12 - sqr(2560))/4 = -15.649 to 3 d.p
40 x 8=320
8 x 320 = 2560
To find 8 x 320, you can break down 320 into 300 + 20. Since you know that 8 x 300 equals 2400, you can calculate 8 x 20, which equals 160. Finally, add 2400 and 160 to get the result of 8 x 320, which is 2560.