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Simplify: 4 - 2x + x2 + 2x + 4

4 - 2x + x2 + 2x + 4

= x2 + 8

MC
Answered by Matthew C. • Maths tutor
2114 Views

Simplify: 4x + 5y + 6x -7y

10x - 2y

MC
Answered by Matthew C. • Maths tutor
3932 Views

Shape ABCD is a parallelogram. Y is the mid-point of AB and Z is on BC such that BZ=1/2ZC. Given that AB=a and BC=b, describe, in terms of a and b: a) AC b)CY c)YZ

a) AC = a + b

b) CY = -b -1/2a 

c) YZ = 1/2a + 1/3b

MC
Answered by Matthew C. • Maths tutor
4407 Views

Thomas wants to see how far he can throw a javelin. He records four of his throws as 45 metres, 40 metres, 55 metres, and x metres. Given that the mean of Thomas' throws is 50, determine the value of x.

Answer is 60.

MC
Answered by Matthew C. • Maths tutor
2947 Views

A particle of mass 0.8 kg moving at 4 m/s rebounds of a wall with coefficient of restitution 0.3. How much Kinetic energy is lost?

Coefficient of Restitution (CoR): Speed of Approach x CoR = Speed of Seperation 4 x 0.3 = 1.2 ms-1 Kinetic Energy (KE) Lost: KE lost = Initial KE - Final KE Initial KE = 1/2mv2      ...

GM
Answered by George M. • Maths tutor
3186 Views

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