Susan started with a certain number of dollars. she then decided on a number of dollars she would save each day. she added the dollars she saved to the amount with which she started. at the end of day 2, susan had a total of 20 dollars saved. at the end of day 5, she had a total of 32 dollars saved. how many dollars does susan start with? show or explain your work. write an equation to model the number of dollars susan has saved, y, after x days.

Susan start with 12 dollars

Equation to model the number of dollars Susan has saved, y, after x days :

Step-by-step explanation:

Given :  She added the dollars she saved to the amount with which she started. At the end of day 2, Susan had a total of 20 dollars saved. At the end of day 5, she had a total of 32 dollars saved.

To Find: How many dollars does Susan start with? Show or explain your work.  Write an equation to model the number of dollars Susan has saved, y, after x days.

Solution :

Since At the end of day 2, Susan had a total of 20 dollars saved.

⇒

At the end of day 5, she had a total of 32 dollars saved.

⇒

So, using two point slope from find the equation of line

x denotes days

y denotes dollars she saved

--a

Thus the equation to model the number of dollars Susan has saved, y, after x days :

Now to calculate How many dollars does Susan start with?

Put x = 0 in equation a

So,Susan start with 12 dollars

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation:

throw the computer

step-by-step explanation: