Add and Subtract Square Roots · Exercise 86

Suzy wants to use square tiles on the border of a spa she is installing in her backyard. She will use large tiles that have area of 12 square inches, medium tiles that have area of 8 square inches, and small tiles that have area of 4 square inches. Once section of the border will require 4 large tiles, 8 medium tiles, and 10 small tiles to cover the width of the wall. Simplify the expression $4\sqrt{12}+8\sqrt{8}+10\sqrt{4}$ to determine the width of the wall. (Round to the nearest tenth of an inch.)

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Elementary Algebra 2e · §9.3 Add and Subtract Square Roots · Exercise 86