Answer:
The domain is the interval [5,∞)
Step-by-step explanation:
we have

we know that
The radicand (number under a radical) must be greater than or equal to zero
so

solve for x
Adds 5 both sides


therefore
The domain is the interval [5,∞)
All real numbers greater than or equal to 5
=7x-x^2>8
0=7x-x^2-8
0= -x^2 + 7x -8
0=(x^2 + 8x)-(x - 8)
0=x(x + 8)-1(x +8)
0=(x-1) 0=(x+8)
x=1 x= -8
Answer:
72 m²
Step-by-step explanation:
A = 4x(5+4+5) + (4x4)
= 4x14 + 16
= 56 + 16
= 72 m²
In the third step, 10 is the mass of the dog. As such, it should have been substituted to w and not to m.