Use variation parameters to find a general solution to the differential equation given that the function y1 and y2 are linearly independent solution
ty''-(t+1)y'+y=t^2; y1=e^t, y2=t+1

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

Which rational number could be graphed between -4 and -5

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?