Tbh I don’t even know like wouldn’t you divide 50 by 14040 to find out how long it’ll take?
Number is n
sum means add
less than is <
sum of a number and 15 is less than 30
n+15<30
if yo solved yo get
n<15
<span>2(30)+2x=860
This is because the 4 sides of the rectangle add up to the perimeter.
The unknown side is x, and there are two of those, and there are also two sides of 30.
They all add up to the perimeter.
So:
2(30) + 2x = 860</span>