(-9x-6y=-54) +(8x+6y=50)= -x=-4; x=4
3(4)+2y=18
12+2y=18
2y=6 ; y=3
Each birthday card costs 4
The answer to this question is -8
Answer:
A. ху
Step-by-step explanation:
Assuming your x'y' is xy with the variables to the first power, that is the term with the smallest x- and y-exponents. It is a factor of all the other terms so is the <em>greatest common factor</em> of all the terms.
Vertex: (-4,-3)
Focus: (-4, -11/4)
Directrix: y= -13/4
