Question 140452
parallel means same slope, so y=3x+b


the highest point of the graph is the vertex, which is on the axis of symmetry


y=x(10-x) __ y=-x^2+10x
__ for axis of symmetry, x=-b/2a __ x=-10/(-2) __ x=5


substituting __ y=5(10-5) __ y=25


substituting __ 25=3(5)+b __ 25=15+b __ 10=b


so t is y=3x+10