Answer:
I think that the answer is 25,180.
Step-by-step explanation:
An equation is formed of two equal expressions. The value of 'a' in the given equation is 6.452.
<h3>What is an equation?</h3>
An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
The given equation can be solved for 'a' as shown below,

0.75a = 10 - 0.8a
0.75a + 0.8a = 10
1.55a = 10
a = 6.452
Hence, the value of 'a' in the given equation is 6.452.
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The solution of x in -6 + 3x - 9x^2 = -16 is 
<h3>How to solve the equation?</h3>
The equation is given as:
-6 + 3x - 9x^2 = -16
Add 16 to both sides
10 + 3x - 9x^2 = 0
Rewrite as:
9x^2 - 3x - 10 = 0
Solve for x using the quadratic formula

So, we have:

Evaluate

Hence, the solution of x in -6 + 3x - 9x^2 = -16 is 
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Answer:
5 + 2.5 > 4 feets
4 + 5 > 2.5 feets
2.5 + 4 > 5 feets
Step-by-step explanation:
The triangle states that :
The sum of any 2 sides of a triangle must be greater than the third side
Side Given are :
5feets ; 2.5 feets ; 4 feets
In other to obey the triangle rule :
5 + 2.5 > 4 feets
4 + 5 > 2.5 feets
2.5 + 4 > 5 feets