exam Maths Puzzle Numerical Ability

find the domain

y=1/sqrt x-1

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exam Other Question

A boat weighs 1500 lb more than its motor and 1900 lb more than its trailer. Together the boat and motor weight five times a much as the trailer. How much does the boat weigh?

thank you! I have tried about 12 different equations!
Solve the following system of linear inequalities by graphing.
x + 2y "is less than or equal to sign" 3
2x - 3y "is less than or equal to sign" 6