# SOLUTION: Is this correct? 1. Multiply (x-2)(x+2); answer: x^2+4? 2. x^4-2x^3+5x^2+10x+12 for value of x=2 ; answer: 52? 3. A chemist has a 25% and a 50% acid solution. How much of

Algebra ->  Algebra  -> Graphs -> SOLUTION: Is this correct? 1. Multiply (x-2)(x+2); answer: x^2+4? 2. x^4-2x^3+5x^2+10x+12 for value of x=2 ; answer: 52? 3. A chemist has a 25% and a 50% acid solution. How much of      Log On

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 Algebra: Graphs, graphing equations and inequalities Solvers Lessons Answers archive Quiz In Depth

 Click here to see ALL problems on Graphs Question 125270: Is this correct? 1. Multiply (x-2)(x+2); answer: x^2+4? 2. x^4-2x^3+5x^2+10x+12 for value of x=2 ; answer: 52? 3. A chemist has a 25% and a 50% acid solution. How much of each solution should be used to form 200ml of a 35% acid solution? ; answer: 120 ml of 25% and 80 ml of 50%? I appreciate the help; hopefully I got them right. Answer by checkley71(8403)   (Show Source): You can put this solution on YOUR website!1) (X-2)(X=2)=X^2-4 ANSWER. 2) X^4-2X^3+5X^2+10X+12 WHEN X=2 THEN 2^4-2*2^3+5*2^2+10*2+12 16-2*8+5*4+20+12 16-16+20+20+12=53 ANSWER. 3) .5X+.25(200-X)=.35*200 .5X+50-.25X=70 .25X=70-50 .25X=20 X=20/.25 X=80 ML OF 50% ACID IS REQUIRED. 200-80=120 ML OF 25% SOLUTION IS REQUIRED. PROOF: .5*80+.25*120=70 40+30=70 70=70