Given the System of Equations, using Cramer's Rule what is the coefficient matrix D equal to? 4x - 3y = 11
6x + 5y = 7

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.

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Consider the function f(x)=-5x+3 what is f(-2)