How do you convert 1892 grams to come in kilograms

Astudent simplified a rational expression as shown.

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?