book Maths Puzzle Numerical Ability

If you add together 15% of one large Pizza and 15% of one small Pizza, what percentage of Pizza do you have ?

( COULD THE CALCULATION BE SHOWN IN THE ANSWERE PLEASE)

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book Other Question

Name the properties of real numbers illistrated below please?
4 + (7 + 1) = (4 + 7) + 1

Thanks,
Denise How do I solve the below equation? I know I have to add the two absolute value equations, but can not find any information on how to add them.

If f(x) = | x + 2| and g(x) = | x - 3 |, then (f + g)(x) =