PLEASE HELP! URGENT! 1. What is the correct simplified form of 3±9sqrt5/3?

A. ±3sqrt5
B. 1±3sqrt5
C. 1±9sqrt5
D. ±9sqrt5

2. Which of the following is a true statement regarding the quadratic formula form of the solutions to a quadratic equation?

A. The solutions x=4±8sqrt5/2 must be left in exact form.
B. The solutions x=4+8sqrt5/2 can be simplified to x=2±8sqrt5
C. The solutions x=4±8sqrt5/2 can be simplified to x=2±4sqrt5
D. The solutions x=4±8sqrt5/2 are in simplest form

The rows and columns of lattice points in a three-by-three square array are evenly spaced one unit apart. how many distinct triangles with at least one side of length 2 units can be drawn using three lattice points for the vertices?

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Polygons efgh and e′f′g′h′ are shown on the coordinate grid: what set of transformations is performed on efgh to form e′f′g′h′? a. a translation 1 unit to the left followed by a 90-degree counterclockwise rotation about the origin b. a translation 1 unit to the right followed by a 90-degree counterclockwise rotation about the origin c. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the right d. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the left