exam Maths Puzzle Numerical Ability

tutor could you help me please..my problem is: Solve (X1/5)^3

Thank you

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exam Other Question

Could someone please help me with the following problem:

Solve using matrices:

x + 2y -z =2
2x -2y + z =-1
6x +4y =3Z = 5

Thank You
RF Given y=3x^2+6x

Please explain the process in steps. Thanks!

A.) find the y-intercept
B.) find the x-intercepts (if any)
c.) find the vertex
D.) Sketch the parabola.