exam Maths Puzzle Numerical Ability

Can you please help me with this problem:
Sketch the graph of y=2^x-2 and y=log2(x+1)

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exam Other Question

Carol has received a loan of 50000pesos. She has invested part of it at 10% annual interest and the remaining amount at 14%. If she receives 6400pesos at the end of one year, how much has she invested at each rate? Graph y=3x-2 using sope intercept form