PLS HELP I DONT UNDERSTAND :( WILL MARK BRAINLIEST!!

Mathematics

1 answer:

Murljashka [212]3 years ago

8 0

Answer:

where is the question though?¯\_(⊙_ʖ⊙)_/¯

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A section of a railway has a slope of approximately 0.46. In this section, a vertical change of 1 unit corresponds to a horizont

Ulleksa [173]

The slope is the vertical change per 1 unit of horizontal change so:
v = vert cahnge
h = hor change

slope = v / h
.46 = 1 / h

so solve that equation for h and that's your answer

6 0

3 years ago

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slava [35]

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4 0

3 years ago

In , there were immigrants admitted to a country. In 1960, the number was . a. Assuming that the change in immigration is lin

Arisa [49]

Answer:

The answer is below

Step-by-step explanation:

The complete question is:

In 1960, there were 237,794 immigrants admitted to a country. In 2001, the number was 1,150,729.

a. Assuming that the change in immigration is linear, write an equation expressing the number of immigrants, y, in terms of t, the number of years after 1900.

b. Use your result in part a to predict the number of immigrants admitted to the country in 2013.

c. Considering the value of the y-intercept in your answer to part a, discuss the validity of using this equation to model the number of immigrants throughout the entire 20th century.

Answer:

a) From the question, we can get two ordered pairs which are $(t_1,y_1)=(60,237794)\ and\ (t_2,y_2)=(101,1150729)$

Using the equation of a line given two points:

$y-y_1=\frac{y_2-y_1}{t_2-t_1}(t-t_1)\\ \\y-237794=\frac{1150729-237794}{101-60}( t-60)\\\\y-237797=22266.71(t-60)\\\\y=22266.71t-1098205.44$

b) In 2013, t = 2013 - 1900 = 113.

Hence:

$y=22266.71t-1098205.44\\\\y=22266.71(113)-1098205.44\\\\y=1417932.488\\\\y=1417933$

$y=22266.71t-1098205.44\\\\the\ y\ intercept\ is\ at\ t=0,hence:\\\\y=22266.71(0)-1098205.44\\\\y=-1098205.44$

Since the y intercept is negative, that is in 1900 the number of immigrants was -1098206 which can not be possible. Hence this equation is not valid and the growth may or may not be linear.

7 0

3 years ago

I have this problem for my math homework. Last question left and I cannot figure it out:

Orlov [11]

Answer:

so the including all cars percent is 100. so i should be like 13

Step-by-step explanation:

4 0

4 years ago

Help me please <br><img src="https://tex.z-dn.net/?f=2x%20%2B%2015%20%3D%20%20-%203x" id="TexFormula1" title="2x + 15 = - 3x" a

lisov135 [29]

Step-by-step explanation: