5!/2!=120/2= 60 arrangements
7(x+4)=0
7x+28=0
7x=-28
X=-28/7
X=-4
Answer:
-8
Step-by-step explanation:
(-2)(-2)(-2)
4(-2)
-8
Step-by-step explanation:
2×length + 2×width = 45
length = 4×width
now, we are using the second equation (a variable identity) in the first equation
2×4×width + 2×width = 45
8×width + 2×width = 45
10×width = 45
width = 45/10 = 4.5 in
length = 4×width = 4×4.5 = 18 in
the area of the rectangle is
length × width = 18 × 4.5 = 81 in²
