10. Kayori has saved $400 to buy new clothes. She will spend $40 a week on new clothing items. Choose the best variable to use if you were writing an expression to represent the situation.
(1 Point)
d number of days
w: number of weeks
c number of clothing items
k: Kayori

w: number of weeks

Step-by-step explanation:

Because it mentions she starts with $400 and spends $40 a week. That's like saying every week she'll spend $40.  

Just because I feel like it, I'll give you the equation.

40w = 400

400/40 = w

Hope that helps and have a great day!

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.