exam Maths Puzzle Numerical Ability

Please keep me solve this problem:
2(x+2)^0

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exam Other Question

I have figured the slope as (-3/4) the y intercept (0,8) as being (3/4x)+8 but I am not sure how to graph this one. Can you help please? Thanks! 2nd question is same as 1st, factor tree. How do I do and what is the prime factorization of the number.

90
5 x _
_ x _ x 2
_ x _ x _ x _