If there are $0.90 (us) to €1.00 how many euro would u get for $9.00 (us) ?

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)