exam Maths Puzzle Numerical Ability

Solve the following system of linear equations by the elimination method:
y=2x-5
8x-4y=20

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exam Other Question

1. a) If k(x)= -f(x) what would the new coordinates of P (which were 0,-1) be after the reflection? Give answer in (x, y) form.

Answer:

b) Consider the function f(x)x Solve

x^2 + y^2 = 5

x - 3y = 5