use Matlab code $2-$Use MATLAB to solve the following problem:

$[$ x$-3$ y$=2$; x$+5$ y$=18$; $4$ x$-6$ y$=10]$

$3-$ Write a function that accepts temperature in degrees F and computes the corresponding value in Kelvin $($K$).$ The relation between the two is T$[$K$]=(5/9)($T$^$F$-32)+273.4-$ The array price given below contains the price in dollars of a certain stock over $10$ days. Use MATLAB to determine how many days the price was above $ $20.$

price $=[19,18,22,21,25,19,17,21,27,29]$