me spekt yu got it bakward & need tu EVALUATE y at x=47
y=-0.3476 x^2+10.498x -23.078
at x=47, x^2=2209 & -0.3476x=-767.8484
10.498x=10.498*47=+493.406
add 3 terms...-767.8484 -23.078+493.406...-297.5204
##### if yu reelee want y=47, yu gotta tri variee x's & home tu iterate tu sumthun that come kloes
me get x=9.90111
look at x=10...x^2=100 & -0.3476*x^2=-34.76
10.498*x=10.498*10=+104.98
104.98-34.76 -23.078...+47.142...pretty kloer tu 47