This is the systems of equations. and I cant figure out the (x, y) answer
2x+3y=1
x-2y=4

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

The price of a dozen eggs was $1.63. suppose the price increases m dollars per dozen and then the price decreases $0.12 per dozen. which expression represents the current price of eggs after the two price changes?