exam Maths Puzzle Numerical Ability

can someone please help me with these 2 problems i have
factor each expression
y2+6y-7
x2+10x+25

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exam Other Question

I have no clue as to what I am doing. Please help. The picture that is with this is of a rectangular cubed box and on one of the sides it has this next to it: x + 2 .
Geometry. If 8 co-workers went to Subway, 13 co-workers went to Burger King, and 3 went to both locations, how many co-workers are there that went to lunch.