9. negative 10. negative 11. negative 12.negative 13.negative 14. positive 15. positive 16. negative 17. negative 18. positive
Use a percentage finder ;), also it will show you the work on some sites
;)
9 x² + 16 y² = 144 / : 144 ( divide both sides by 144 )
x²/16 + y²/ 9 = 1 ( ellipse )
a² = 16, a = 4
b² = 9, b = 3
Answer:
B ) ellipse;
Domain : { -4 ≤ x ≤4 }
Range: { -3 ≤ y ≤ 3 }
4 3/4 - 2 = 2 3/4
2 3/4 - 1 1/10 is the same as 2 30/40 - 1 4/40 = 1 26/40
1 26/40 = 1 13/20 pounds left
2x+4-3x=0
-4 -4
2x-3x=-4
-1x=-4
_ _
-1 -1
x=4
so the answer is x=4
