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Nat2105 [25]
2 years ago
13

Help I need a equation

Mathematics
1 answer:
yarga [219]2 years ago
5 0

9514 1404 393

Answer:

  a) y = 3x-1

  b) y = x+5

Step-by-step explanation:

a) We notice the x-values change by 1, so the change in the y-value is the slope. -4 -(-7) = 3 is the change between the first two y-values.

The y-intercept is shown by the ordered pair (0, -1). So, the slope-intercept equation is ...

  y = 3x -1

__

b) We note that the change in x is 2 units, as is the change in y. Then the slope of the function is m = 2/2 = 1. The y-intercept (b) can be found from ...

  b = y -mx

  b = 7 -1·2 = 5

Then the slope-intercept equation is ...

  y = x + 5

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The land area of a country is about 5.0 million square​ miles, and the population is about 600 million people. What is the avera
podryga [215]

Answer:

120 people/sq. mile

Step-by-step explanation:

Population Density is the concept of how "crowdy" a place is. The more the population density, the more crowded that place is.

The population density is found by dividing the "number of people" by the "land area" (in sq mile or sq km).

Here, it is given there are 600 million people, so

Number of People = 600,000,000

And, the land area is given as 5 million square miles, so

Land Area = 5,000,000 sq. miles

Hence,

Population Density = 600,000,000/5,000,000 = 120 people/sq. mile

6 0
3 years ago
Can someone help me with this question? Will give brainliest :) (valid answers only or you’ll be reported)
Pani-rosa [81]

Answer:

...

Step-by-step explanation:

7 0
3 years ago
Find the Value of X (angles)
STatiana [176]

Answer:

x= 55

Step-by-step explanation:

The  two angles add to 180 degrees since they form a straight line

2x+70 =180

Subtract 70 from each side

2x+70-70=180-70

2x= 110

Divide by 2

2x/2 = 110/2

x= 55

7 0
3 years ago
Read 2 more answers
HELP QUICK PLEASE<br> Determine the following values of the function.<br><br> f(-3) = <br> f(2) =
astra-53 [7]
F(-3) would be -8, because you would use the first equation. f(2) would be 4 apparently cause theres no x after the 4, or in the equation of the 4. Hope this helps. Please rate, leave a thanks, and mark a brainliest answer(not necessarily mine). Thanks, it really helps! :D
4 0
3 years ago
Read 2 more answers
Find the value of z in the isosceles triangle shown below.<br> V20<br> V20<br> 8
Andrews [41]

Answer:

<h3>x = 2</h3>

Step-by-step explanation:

use Pythagorean theorem:

a² + b² = c²

where a = x

           b = 8/2 = 4  

           c = √20

plugin values into the formula:

x² + 4² = (√20)²

x² + 16 = 20

x² = 20 - 16

x = √4

x = 2

5 0
3 years ago
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