Question

An archway is modeled by the equation y = -2x2 + 8x. A rod is to be placed across the archway at an angle defined by the equation x − 2.23y + 10.34 = 0. If the rod is attached to the archway at points A and B, such that point B is at a higher level than point A, at what distance from the ground level is point B?

8 units



6 units



5 units



3 units

Please help me!

Answer 1

Well, I am here.

Answer 2

Can you help me with this please?

Answer 3

One minute, please!

Answer 4

It can be easily solved by graphing both equations. I tried to solve it by setting the equations equal to each other but failed.

Answer 5

was 8 correct?

Answer 6

I got very close to six

Answer 7

I think @retirEEd got the the correct approach!

Answer 8

agree from the graph