- Any math help please? are these right?

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F(x) = −7x + 8, −1 ≤ x ≤ 1 x2, 1 < x ≤ 5
Describe the interval(s) on which the function is continuous.? Air at standard sea level condition is adiabatically compressed to 60psig. what is the temperature? The roots of the equation x^(2)-5x+p=0 are also the roots of the equation x^(3)+qx+30=0 Find q+p? What kinds of diseases can bacteria get? Can anyone explain or summarize the Doppler Effect?