Math homework. Please help

Posted on 2014-04-01 06:07:00 in Math by JUDY

1) For what value of c does the quadratic function f(x)=3x^2+8x+c have exactly one x-intercept?





2) John owns a hotdog stand. His profit is represented by the equation P(x)=-x^2+12x+43, with P being profits and x the number of hotdogs sold. What is the most he can earn?





3)Find a polynomial of degree 3 with real coefficients that satisfies the given conditions. Zero of -5 having multiplicity 2 and zero of 10 having multiplicity 1; P(0)= -250

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