1. What is the value of 2.6 + (-3)?
a) -0.4
b) 5.6
c) - 5.6
d) 0.4

a) -0.4.

Step-by-step explanation:

2.6 + (-3)

= 2.6 - 3

= -0.4.

do you mean add both of the equations together

because if you do the answer is 10x-5

step-by-step explanation:

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