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Work out how many miles Dan does in a week if he drove. 24.2 x 5 = 121Work out how many gallons of petrol this would be. 121/32.3 = 3.746130031Convert into litres. 3.746130031 x 4.5 = 16.85758514Work out ...
x2 + y2 = 25 ...
dy/dx = u.dv/dx + v.du/dxu = x3, v = ln xdu/dx = 3x2, dv/dx = 1/xdy/dx = 3x2 lnx + x2
We multiply the 2x in the first bracket by everything in the second bracket to give: 2x2-2xWe then multiply the 3 in the first bracket by everything in the second bracket to give: 3x-3Putting 2...
Equation: x2 +4x-5=0 (This is in the form ax2+2bx+c=0)First divide 2b by 2 (4/2=2)Then put this into (x+b)2-(b)2+c=0This gives: (x+2)2-(2)2GJAnswered by George J. • Maths tutor2501 Views
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