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You and your friend are saving money to buy bicycles that cost $175 each. You have $45 to start and save an additional $5 each week. The graph shows the amount $y$ (in dollars) that your friend has after $x$ weeks. Who can buy a bicycle first?


you can buy the a bicycle first.
you or your friend

You and your friend are saving money to buy bicycles that cost 175 each You have 45 to start and save an additional 5 each week The graph shows the amount y in class=

Respuesta :

Answer:Your friend would buy it first by 9 weeks

Step-by-step explanation:

175-45=135, 135/5=29 weeks so it would take you 29 weeks but for your friend it wound take 39-15=24, 24/3=8, 160/8=20 weeks

Friend can buy bicycle before you

What is Unitary Method?

A technique to find the value of one single unit and then finding the necessary value by multiplying the single unit value

we already have $45

Need to save 175 -45 = $130

our equation will be

Let us consider , it takes  x weeks to save $ 175 and  we are saving $ 5 per week

45 +  5x = 175

5x = 130

x = 26

It will take   26 weeks to save a total of $ 175

Now calculating for your friend

slope of line ( observe the graph ) = y2 - y1/ x2 - x1 = 39 - 15 / 3-0 = 8

Friend already have $ 15

Money remaining = 175 - 15 = $160

let Number of weeks friend need to save be = y

per week saving =8

Using Unitary Method

8 * y = 160

y = 160 / 8 = 20weeks

Friend can buy bicycle before you

Learn more about Unitary Method

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