# On fridays at the ballpark, a cup of soda costs \$2, and each refill costs \$0.80. if x represents the number of refills, which of the following equations represents the amount a person spends on soda? a. y = 0.8x + 2 b. y = 0.8x + 2.8 c. y = 2x + 2.8 d. y = 2x + 0.8

skykopystecky795   ·   10.01.2020 10:31
29.06.2019 05:00

for this case we must apply distributive property to the following expression:

[tex]-2 (2.1x + 3y-0.8)[/tex]

the distributive property states that:

[tex](a + b) (c + d) = ac + ad + bc + bd[/tex]

then, when applying the property we have to multiply the -2 for each term within the parenthesis:

[tex]-4.2x-6y + 1.6[/tex]

[tex]-4.2x-6y + 1.6[/tex]

29.06.2019 03:30
What are 5e numbers?
26.06.2019 10:00

the correct answer is b. negative exponential growth.

step-by-step explanation:

you can tell it's an exponential function because it decreases rapidly then levels out and never touches the x-axis.

it is negative because the y-axis decreases as the x-axis increases.

therefore it is a negative exponential growth graph.

hope i ! 03.08.2020 23:14
That would be : y = 0.8x + 2

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