A,81 because if you try checking 81 will be the only composite number im in 6 grade.....
Answer:
84.5
Step-by-step explanation:
12.3(3)+11.9(4)=84.5
I hope this helps you
y=x^2-81
x^2=y+81
x=square root of y+81
f^-1 (x)= square root of x+81
Answer:
-3x^2 - 5y^2 = 36
Step-by-step explanation:
x^2+y^2=r^2
