exam Maths Puzzle Numerical Ability

hi can u help me with this problem...

[1 1/2 4 5 [-2 -4 7/8 11/2

2 3/5 8 9] + 3 2 -1 -10/11]

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exam Other Question

simplify square root of 75a^2
over
square root of 5 A grocery store sells a mixture of peanuts and raisins for $1.75 per pound. If peanuts cost $1.25 per pound and raisins cost $2.75 per pound, what amount of raisins ans peanuts go into 1 pound of the mixture?