exam Maths Puzzle Numerical Ability

I need to find the indicated value of the piecewise-defined function

f(-8)for f(x)=3x if x <-1
x-6,if >-1

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exam Other Question
The vertices of a triange are (5,3) (5, -1) and (-1, -1) what would the fourth one be? Find the length of each side of the rectangle so that it has the given perimeter.

2x - 5

x

Perimeter = 50 in.