Soos is spending money at an average rate of $5 per day. After 9 days, he has $25 left. How much money did Soos have at the beginning (on day 0)?

y - 5= 9(x - 25)

$70

Step-by-step explanation:

According to the problem, calculation of given data are as follows:

Spending money at rate = $5 per day

After 9 days money left = $25

We can calculate the money on day 0 by using following formula,

y = mx + b

Here, y = money left after 9 days

m = rate of spending money

x = number of days

b = money on day 0

So, by putting value, we get

$25 = (-5 × 9 ) + b

b = $25 + $45

= $70

i would say c is the best answer, hope it's right!

good luck! =)

cutie~