Triangle congruence geometry

Not necessarily  

Step-by-step explanation:

The triangles have two sides congruent to each other (BA and RA/BE). They also have angles BRA and BEA congruent, but these do not fit into any of the congruency theorems (SSS, SAS, ASA, or AAS).

2

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