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3 years ago

How to do substitution

1 answer:

4 0

Substitution is where you place a number instead of a letter. If you they give you a question let’s say “what is he value of x when x=5”
And he equation is
8x=40 (super easy equation but oh well)
So you “substitute” the x
So it will be
8*5=40
Hope this helped and I’m not sure if I made any sense at all but I tried

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Zielflug [23.3K]

Answer:

The left answer

Step-by-step explanation:

They are asking if their is a relationship between the x and y value

for the left one, when the value of y is shown to be the x value divided by 3 as

11/3 =11 over 3, 12/3 = 4, 13/3 = 13 over 3

But the right answer does not seem to have any correlation/relationship between its x and y values

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3 years ago

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A population, P(t) (in millions) in year t, increases exponentially. Suppose P(9)=16 and P(18)=24. a) Find a formula for the pop

jenyasd209 [6]

Answer: $\frac{32}{3}\left ( 1.0460\right )^t$

Step-by-step explanation:

Given

Population changes exponentially

$P\left ( t\right )=ab^t$

$P\left ( 9\right )=16$ ------1

$P\left ( 9\right )=16=ab^8$

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divide 1 & 2 we get

$\frac{24}{16}=\frac{b^{18}}{b^9}$

$\frac{3}{2}=b^9$

Substitute $b^9$ in 1 we get

$a=\frac{32}{3}$

Thus $P\left ( t\right )=\frac{32}{3}\left ( 1.0460\right )^t$

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3 years ago

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djverab [1.8K]

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Step-by-step explanation: