Obliczcie mi to zadanie dam dużo o punktów i dam NAJ Zadanie 13 i 15

zad 13 [(√0,81 + √1,21 +√1,69) : (√1600 :√400)]*70% = [(0,9 + 1,1 + 1,3) : (40 : 20)]*0,7 = = (3,3 : 2)*0,7 = 1,65*0,7 = 1,155 zad 15 {(√√81*√16) : [2*(√5¹/₁₆ + √3¹/₁₆)]} * 100% = {(√9*4) : [2*(√⁸¹/₁₆ +√⁴⁹/₁₆)]} * 100% = = {√36 : [2*(⁹/₄ + ⁷/₄)]} * 100% = [6 : (2 * ¹⁶/₄)] * 100% = (6 : ³²/₄) * 100% = = (6 : 8) * 100% = 0,75 * 100% = 75%

15.[latex]2( sqrt{ frac{81}{16} } + sqrt{x} frac{49}{16} )=2( frac{9}{4} + frac{7}{4} )=2* frac{16}{4} =8  8-100% 6-x% x=[latex] frac{6}{y8} [/latex]*100=75%