Consider the system of equations:

3x − 4y = 12
2x + 6y = 18

Choose all of the equations that could be used when solving this system by substitution.

x = 9 − 3y
y = 18 − 3x
y = 3x + 3
x =
4
3
y + 4

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.

Find the height of a square pyramid that has the volume of 32 ft.³ and a base lengthof 4 feet

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%