Answer:
4L-12
Step-by-step explanation:
let's assume the length = L
then the width of the rectangle is L - 6
perimeter = 2× (a+b)
where "a" and "b" are the length and the width of the rectangle.
so perimeter = 2× (L + L - 6)
2 × ( 2L - 6)
4L - 12
6 apartments in 2.5 hours
30 apartments in ? Hours
6/2.5=30/x
6x=(30)(2.5)
x=75/6
x=12.5 hours
Answer:
99
Step-by-step explanation:
(40+49)+10=89+10=99
Answer:
Multiply the second equation by 2
Step-by-step explanation:
Given


Required
Get matching coefficient for elimination


The coefficient of x in both expressions are factors.
So, we can multiply the second equation by 2 to get the coefficient of x in the first.
i.e.


So, the system becomes:


<em>Now, x can be eliminated</em>