Explain how the commutative property of addition, the associative property of addition and mental math can you find 75.2+(57.376+24.8). what is the sum

The sum of 75.2+(57.376+24.8) is 157.376.

Explanation:

The commutative property of addition states that,

The associative property of addition states that,

The given expression is 75.2+(57.376+24.8).

First use commutative property of addition in the parenthesis.

Now use associative property of addition.

Now simplify the expression,

Therefore, the sum of 75.2+(57.376+24.8) is 157.376.

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204