Book Maths Puzzle Co-ordinate geometry

can you graph the function f(x)=-(x+2)2 + 3

x+2 the 2 the exponent

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Book Other Question

Please help me to solve these questions because i do not know how. thank you.

1. Given that T=(n-m)d,express n in terms of T,d and m.

2. Given that p+k/m=p/m,express p in ter A 50-gallon barrel of milk is 6% butterfat. How much skim milk (no butterfat)should be mixed to make milk that is is 3% butterfat?