if alpha and beta are the zeroes of the polynomial x^2-8x+7 then find the value of alpha^4*betA^2+ALPHA^2*BETA^4

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?

If /is a line of symmetry, plot the partner points for the ones shown. noch 6 5 4 -3 -2 -1