- 60sec=1min 5min=100cal 1sec=?cal?

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What is equation of straight line which passes through (x1 , y1) and is perpendicular to the line (i) xx1+yy1=a^2
(ii) (xx1/a^2)+(yy1/b^2)=1? Please help with hard precalculus questions? In C++ how do i do the following except for a system of equations below:? Math Question, need help with 48, I got .375 but i feel like that is not the right answer? Let A-n = n² + 50. What is the largest prime divisor that divides two consecutive terms of the sequence?