Answer:
100-20=80
need:don't need=20:80=2:8=1:4
ratio is 1:4
Sqrt [(-4 -(-7)^2 + (6-3)^2 ]
= sqrt (9 + 9)
= sqrt 18
which can also be written as sqrt 9 * sqrt 2 = 3 sqrt 2
18,800,000 you get this answer by moving the decimal to the right for every power run this case you move it 7 times
The correct answer would be:
f(x)= x2 (x2+4)
Imagine the width is x. So the length is 4x.
put the perimeter into an equation, so it would be
4x+4x+x+x=90m
10x=90
divide by 10
x=9
so the width = 9cm so the length is 36cm
36+36+9+9=90