Question

1.Calculati [3^2 * 3^3 + 5^17 : 5^15 -(2^3)^2] : 51
2.Rezolvati ecuatia 1,75 * (0,35x+6,5) - 7,5=10

Answer 1

(9x27+5²-2⁶):51=
(243+25-64):51=
204:51=4

1.75(0.35x+6.5)-7.5=10
1.75(0.35x+6.5)=10+7.5=17.5
0.35x+6.5=17.5:17.5=1
0.35x+6.5=1
0.35x=1-6.5=-1.5
x=0.35:1.5
x=2.33

Answer 2

  [3²*3³+5¹⁷:5¹⁵-(2³)²]:51=
=(9*27+5²-2⁵):51
=(243+25-32):51
=(268-32):51
=236:51
=4,62.. (aproximativ 5)