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zheka24 [161]
3 years ago
13

A small rural town has experienced a population decrease at a rate of 25 people every 5 years since 1970. If the population of t

he town in 1970 was 250, which of the following equations represents the town’s population as a function of time? (Assume 1970 is represented by x = 0, 1971 is represented by x = 1, and so on).
Mathematics
1 answer:
Ganezh [65]3 years ago
8 0
Population decreases at the rate of 25 people every 5 years

slope of a line = difference in y / difference in x (or rise / run) = -25 / 5
slope m = -5

when x = 0 (that is the year 1970 ), the population is 250
x = 0 represents the y -intercept

So which answer choice has slope = -5 and y-intercept =250?


OR IF THAT WAS HARD TO UNDERSTAND

The initial population is 250
It decreases at a rate of 5 people per year

After year one, it will be 250 - 1(5)
After year two, it will be 250 - 2(5)
After year three, it will be 250 - 3(5)

After year x, it will be 250 - x(5)

The function is y = -5x + 250


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Step-by-step explanation:

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Review the steps of the proof of the identity
astraxan [27]

Answer:

step 2

and then step 3 : the error neutralized the error of step 2

Step-by-step explanation:

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and because

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we have

sin(a - b) = sin(a)cos(-b) + cos(a)sin(-b) =

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that means, it is the full radius straight down from the center of the circle.

cos(3pi/2) = cos(270) = cos(-90) = cos(90) = 0

so, step 1 is correct :

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but as we see, the provided step 2 is incorrect.

it should have been the indicated

sin(A)×0 - cos(A)×(-1)

and NOT the provided

sin(A)×0 + cos(A)×(-1)

step 3 based on the erroneous step 2 should then have been

sin(A)×0 - (1)cos(A)

but instead another error with the sign was made that neutralized the error of step 2 and we got after this second mistake by pure chance the overall correct step 3

sin(A)×0 + (1)cos(A)

so, again, the first error was made in step 2.

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4 0
2 years ago
Suppose a triangle has 2 sides of length 3 and 4 and that the angle between these two sides is 60 degrees. what is the length of
shusha [124]

Answer:

\boxed{b.\:\:\:\sqrt{13}}

Step-by-step explanation:

Let the third side of the triangle be h\: units.


We can apply the cosine rule to find h.


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We evaluate to obtain;

\Rightarrow h^2=9+16-24(\frac{1}{2})


\Rightarrow h^2=25-12


\Rightarrow h^2=13

We take the positive square root of both sides to obtain;

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The correct answer is B.

8 0
3 years ago
I need help with this please, thank​
aleksandrvk [35]
5x+4y=8

-5x from both sides, you get 4y=-5x+8
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10x-4y=46

-10x from both sides and you get -4y=-10x+46
divide the whole equation by -4 and you get y=5/2x + -23/2 .

source: MathPapa

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Papessa [141]

Answer:

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Step-by-step explanation:

just add them

8 0
3 years ago
Read 2 more answers
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