If Holly's age is x, then :
Sue's age = x+3
Jeremy's age = 8+x
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Since the question is looking for their product, you just need to multiply them. To multiply these, use FOIL.
[tex](x+3)(x+8) [/tex]
[tex](x*x) + (x*8) + (x*3) + (8*3) [/tex]
[tex] x^2+3x+8x+24 [/tex]
[tex] x^2+11x+24[/tex]
So now we've found the product and since it says at most, it means less than or equal to, [tex]x^2+11x+24 \leq 150[/tex], making your choice correct.
