exam Maths Puzzle Numerical Ability

Given f(x)=3x+4
Find f -1(x)

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exam Other Question

Write the equation of the line passing through each of the given points with the indicated slope. give your results in slope-intercept form, where possible.

(0,5), m= -3/5 Hello,
Please help!

Solve the system of equation by elimination.

6x + 5y = -20
-6x - 10y = 25

Thanks