exam Maths Puzzle Numerical Ability

I really need some help with multiply and divide the radical expression

Square7 (2 square3+ 3 square7)

and

18+square567 over 9
thank you for your help[

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exam Other Question
The admission fee at small fair is $1.50 for children and $4.00 for adults. On a certain day, 2,200 people enter the fair and $5050 is collected. How many children and how many adults attended? Please Please Please! help me solve this problem
Sketch the graph the feasible region.

x + y ≥ 7
5x + 7y ≥ 42
x≥0
y≥0