Kelsey has saved $35 towards the cost of A $390 video game in the weeks to come she plans to save in additional $10 per week use unit analysis to represent them out just saved after W weeks and identify the units for the expression

390-35=355

355-10w

355/10=35.5

355-10 (35.5)

35 and a 1/2 weeks

36 weeks to have the full amount needed

36th weeks

Step-by-step explanation:

Kelsey has saved $35 to buy a video game worth $390.

She plans to save additional $10 per week.

Let w represents number of week.

Let s represents total saving in w weeks.

Addition saving per week = $10

In w weeks saving = 10w

Previous saving amount = $35

Total saving in w week, s = 35 + 10w

Expression which represents total saving in w weeks

s = 35 + 10w

Now find number of weeks to save $390

So, put s=390 and solve for w

35 + 10w = 390

10w = 390 - 35

w = 355:10

w = 35.5

Hence, Kelsey will save $390 in 36th weeks.