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a) Factorise: 2x^2-72, and hence b) find the y-intercept of the line with the equation: y=(2x^2-72)/(4x-24)

a) Take out the common factor, giving: 2(x 2 -36), idenitfy the difference of two squares and factoise accordingly, giving: 2(x-6)(x+6) b) you have the facotirse version of the top of the fraction from part ...
IS
Answered by Innis S. • Maths tutor
1687 Views

¿Te gustaría trabajar en el extranjero? ¿En qué país? ¿Por qué? (example of oral exam question)

Sí, me gustaría trabajar en el extranjero, probablemente en un país latinoamericano, dado que tengo un gran interés en la cultura allí tras mi visita a Méjico hace unos años. Afortunadamente, es posible que ...
TP
Answered by Tejan P. • Spanish tutor
2916 Views

If 3(x+2) = 4, what is x?

Step 1: Get rid of the bracket --- 3 * x and 3*2 which makes the left side 3x + 6 /// Step 2: Isolate x on one side --- move the 6 to the other side of the equals sign, taking it away from the 4, which makes...
AB
Answered by Amanda B. • Maths tutor
3371 Views

give a possible reaction mechanism for the conversion of a haloalkane to alcohol

reaction conditions are reflux (ie with heat) with conc. sodium hydroxide. the mechanism is just a standard Sn1 or Sn2 (uni- or di- molecular nucleophilic substition) depending on the haloalkane used. bulkie...
EC
Answered by Edmund C. • Chemistry tutor
2588 Views

A 1kg mass is launched from the ground into the air at an angle of 30 degrees to the horizontal and with initial speed 25 ms^-1. Assuming negligible air resistance, how far from the starting point will the mass travel before it hits the ground?

1: Draw a diagram 2: Split the velocity into its horizontal and vertical components using trig. Vertical velocity: 25sin(30) Horizontal velocity: 25cos(30) 3: Work out forces on the mass to find vertical and...
CS
Answered by Connor S. • Maths tutor
3242 Views