Please combine like terms for the following problem:

7x + 5 - 15x - 23 + 5y

7x + 5 -15x -23 +5y

= -8x-18+5y

Step-by-step explanation:

we know that

Regular polygons have a degree of rotational symmetry equal to divided by the number of sides.

Let

x--------> the number of sides of a regular polygon

Every figure that's symmetrical under -degree rotations is also symmetrical on rotation of any multiple of degrees

so

therefore

the answer is