Question

Need help withba questions

Answer 1

Jules has $1200 and is spending $30 per week.

We can express the amount of money Jules is having in x weeks as:

`M_J=1200-30x`

(See that 30 is expressed in negative because it reduces the amount of money with increasing x).

Kelsey has $400 and is saving $50 per week. This can be written as:

`M_K=400+50x`

Then, we can write Mj=Mk to calculate in which week it happens that they have the same amount of money:

`\begin{gathered} M_J=M_K \\ 1200-30x=400+50x \\ 1200-400=50x+30x \\ 800=80x \\ x=(800)/(80) \\ x=10 \end{gathered}`

I happens when x=10 weeks. The answer is 10.