exam Maths Puzzle Numerical Ability

Determine the domain and range of the function f(x) = 3 - x^2.

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exam Other Question

can someone show how to solve the system by elimination method. Show all steps and check the answer? Thanks!

x - 2y = -1
3X + y = 4 Hello,

I am trying to translate: The sum of two numbers is fifteen. One less than three times the smaller is equal to the larger. Find the two numbers. Thanks.