Answer:
-x^4 + 6x^3 + 7x^2 -4x -4
Step-by-step explanation:
We have that
<span>16*X -16 =4---------------- > X=[4+16]/16
</span>X=[4+16]/16----------------> X=20/16=1.25
X=1.25
the answer is X=1.25
A bird has only 2 legs, and a dog has 4 legs.
x=number of birds
y=number of dogs
We can susggest this system of equations:
x+y=18
2x+4y=50
We can solve this system of equations by substitution method.
x+y=18 ⇒ y=18-x
2x+4(18-x)=50
2x+72-4x=50
-2x=50-72
-2x=-22
x=-22/-2
x=11
y=18-x
y=18-11
y=7
Answer: we have 11 birds and 7 dogs.
Due to the distance formula the answer should be root 113 or 10.63