exam Maths Puzzle Numerical Ability

Could you help me please

f(x)=4x-5 and g(x)=-3x+2, find f(g(-2))

thank you for your time

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exam Other Question

The 4th root of 3s^2t^4 (numerator)
10,000 (denominator)

Please help! I don't get this root stuff! Algebra 1
How do I solve this problem?

The sum of two numbers is more than 20, and one number is 4 more than the other number. What are the numbers?