Joylyn is writing an equation to model the proportional relationship between y the total cost in dollars of downloading videos from a website and X the number of videos downloaded she knows that the total cost to download 3 videos was $12 her work to find the equation is shown below where did Joy Lynn make her first error

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step-by-step explanation:

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).

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chemists are often responsible for designing a chemical reaction and analyzing the products obtained from it. one significant part of designing a chemical reaction is determining the amount of each reactant that is needed and the amount of each product that will be produced. in order to do so, chemists use stoichiometry, the quantitative relationships between reactants and products.