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Solve the following simultaneous equation for x and y: 2x + 5y = 8, 4x + y = 7

Equation A: 2x + 5y = 8 Equation B: 4x + y = 7 2A: 4x + 10y = 16 2A - B: 9y = 9, Therefore y = 1 Sub y back into equation A to find x: 2x + 5 = 8, 2x = 3, x = 1.5
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Answered by Nicholas D. • Maths tutor
6598 Views

solve (2x+3)/(x-4) - (2x-8)/(2x+1) = 1 leave answer in fraction form

times both sides by both denominators = (2x+3)(2x+1) - (2x-8)(x-4) = (2x+1)(x-4) times out brackets = (4x 2 + 8x +3) - (2x 2 -16x +32) = 2x 2 -7x -4 simplify = 2x 2 +24x -29 = 2x 2 -7x -4 bring x's to one si...
AH
Answered by Amber H. • Maths tutor
3595 Views

find the integral of (2x - (3x^1/2) +1) between 9 and 4

2x become x 2 3x 1/2 becomes 2x 3/2 1 becomes x sub 9 into values for x = (81 - 54 +9) which equals 36 sub 4 into values for x = (16 - 16 + 4) which equals 4 now take away the value when you sub in 4 from wh...
AH
Answered by Amber H. • Maths tutor
3639 Views

Décrivez vos vacances préférées.

Mes vacances préférées étaient ceux de l’année dernière ou j’ai fait un tour de l’Europe de l’Ouest. Nous sommes partis de Londres, et avons visité 8 pays au total. Mon pays favori était la Suisse, car le pa...
FH
Answered by Faye H. • French tutor
9513 Views

Describe and explain the trend of reactivity of group 2 metals with water

reactivity increases DOWN the group Extra shells of electrons means there is increased shielding, and therefore atomic radii increases even though nuclear charge increases, the extra shielding outweighs this...
AH
Answered by Amber H. • Chemistry tutor
3401 Views