This looks like an ellipse.
Complete the square for y: 9(y²-6y-7)=9(y²-6y+9-9-7)=9((y-3)²-16).
Rewrite the equation:
4x²+9(y-3)²-144=0; 4x²/144+9(y-3)²/144=1; x²/36+(y-3)²/16=1.
Standard equation of an ellipse is (x-h)²/a²+(y-k)²/b²=1, where (h,k) is the origin or centre.
This is the equation of an ellipse with centre (0,3), a=6 and b=4 (semimajor and semiminor axes).
Answer:
Step-by-step explanation:
For the first triangle
y=160
x= 111
For the second triangle
x= 53
y= 70
For the other question on the bottom
19.8
Answer:
135 In the 3rd year
Step-by-step explanation:
240-35= 205
205-35=170
170-35=135 (Or just use a calculator)
Answer:
the first one
Step-by-step explanation:
