exam Maths Puzzle Numerical Ability

If g(x) = 3x - 8, find g[g(-4)].

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exam Other Question

Perform the indicated operation.

-2a^2/3a^2 * 20a/15a^3 help me someone please? i am so lost with this.

Construction. A garden area is 30 ft long and 20 ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400ft^2, what is the width of the path?