Find the value of "a" if you knew the perimeter was 47 meters long. Here is the experssion 7a-2
49-2 my answer
A rectangular hall is 47 meters long and 25 meters wide what is the perimeter?
a is nothing
144
To find the value of "a" given the expression 7a-2 and the information that the perimeter is 47 meters long, you need to set up an equation and solve for "a."
The perimeter is the sum of all sides of a polygon, so in this case, it would be the sum of 7a-2. Therefore, the equation can be written as:
7a - 2 = 47
To solve the equation for "a," you can follow these steps:
1. Add 2 to both sides of the equation to isolate the term with 7a:
7a - 2 + 2 = 47 + 2
7a = 49
2. Divide both sides of the equation by 7 to solve for "a":
(7a) / 7 = 49 / 7
a = 7
So, the value of "a" that satisfies the given expression and the perimeter of 47 meters is a = 7.
Doesn't help. Is the triangle equilateral and 7a-2 is the length of each side?
If so, then
3(7a-2) = 47
21a - 6 = 47
21a = 53
a = 53/21 metres