Question

Help me with simplified expressions please!

Answer 1

Perimeter of triangle = 19r⁵ - r + 8

Explanation:

Perimeter of triangle formula,

→ A + B + C

→ Sum of all sides

Let's solve for the perimeter,

→ (9r⁵ - 7r + 8) + (9r⁵ + 2r + 15) + (r⁵ + 4r - 15)

→ (9r⁵ + 9r⁵ + r⁵) + (-7r + 2r + 4r) + (8 + 15 - 15)

→ (19r⁵) + (-r) + (8)

→ 19r⁵ - r + 8

Hence, perimeter is 19r⁵ - r + 8.

Answer 2

19r⁵ - r + 8

Explanation:

The perimeter of a two-dimensional shape is the distance all the way around the outside.

Therefore, the perimeter of a triangle is the sum of the lengths of its sides.

`\begin{aligned}\textsf{Perimeter}&=(9r^5-7r+8)+(r^5+4r-15)+(9r^5+2r+15)\\&=9r^5-7r+8+r^5+4r-15+9r^5+2r+15\\&=9r^5+9r^5+r^5+4r+2r-7r+8+15-15\\&=19r^5-r+8\end{aligned}`