Identify the reflection rule on a coordinate plane that verifies that triangle a(-1,7), b(6,5), c(-2,2) and a'(-1,-7), b'(6,-5), c'(-2,-2) triangle are congruent when reflected over the x-axis.
a) (x, y) → (-x, -y)
b) (x, y) → (x, -y)
c) (x, y) → (-x, y)
d) the triangles are not congruent

Option B is correct.

The reflection rule is followed here is,  .

Explanation:

Since, the triangle is reflected over the x-axis , then only y- coordinates will get changed but the x coordinates will remain the same.

Therefore, the only reflection rule on the coordinate plane that verifies the triangle are congruent when reflected over x-axis is,

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