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nikdorinn [45]
3 years ago
12

Can someone explain this I dont understand it

Mathematics
1 answer:
IrinaVladis [17]3 years ago
8 0
Y = mx + b

m is your slope AKA rate of change
b is the y intercept.

from the graph we can see that the y intercept (b) is 15. (look at the y axis and see what point the line crosses on the y, here it is 15, in-between 10 and 20)

slope is rate of change. to figure this out remember slope = rise over run:

slope = \frac{rise}{run}

so pick two points. how much does one point rise after the other point you picked? In the graph it rises 1 square so rise = 1

Now looking at the same two points, how far away from each other are they on the x axis? Looking at the graph they are 2 squares away from each other. so run = 2

Now plug these numbers into the rise over run formula:

slope \: = \frac{1}{2}

Now we have everything we need to put into our formula for a line:

y = mx + b
y = \frac{1}{2} x + 18

For number 16 you should get:

y = \frac{1}{5} x + 3

after you do the same steps again yourself
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Serjik [45]
3(2x-6)-7x+4
3*2x=6x. 3*-6=-18
-7x+6x=-1x. -18+4=-14
-1x/-1=x. -14/-1=14
X=14
7 0
3 years ago
Find the missing side length of the triangle.
Ilia_Sergeevich [38]

Answer:

c = 10

Explanation:

Use Pythagoras theorem: a² + b² = c²

where 'a' and 'b' are legs and 'c' is the hypotenuse (the longest side)

Here given: a = 8 cm, b = 6 cm, c = ?

Substituting values:

8² + 6² = c²

c² = 64 + 36

c² = 100

c = √100

c = 10

5 0
2 years ago
Read 2 more answers
Traingle A' B' C' is the image of triangle ABC under a dilation. What is the scale factor of the dilation? ​
Nataly_w [17]
We need an image to answer the question.
6 0
2 years ago
Can someone answer these 2 questions for me?
Valentin [98]
For the first question x is equal to 4. You get this by adding 7x+2 and 3x and equal it to 42. And then solve algebraically so 10x+2=42
10x=40 so x equals 4
For the second question x is equal to 6.666 and y is equal to 9
You get this by getting x is to 10 as 4 is to 6 and you get y by 6 is to y as 4 is to 6
Hope this helps
4 0
2 years ago
Solve for x and y<br><br> it says i need 20 characters so i’m writing more
fgiga [73]

Answer:

<u> </u><u>For</u><u> </u><u>y</u><u> </u><u>:</u>

From pythogras theorem:

{ \tt{ {(hypotenuse)}^{2} =  {(adjacent)}^{2}  +  {(opposite)}^{2}  }} \\ { \tt{ {(7 + 3)}^{2}  =  \{( {x}^{2} + 9) \} {}^{2} +  {y}^{2}   }} \\ { \tt{100 = ( {x}^{4}  + 18 {x}^{2} + 81) +  {y}^{2}  }} \\ { \tt{ {y}^{2}  = 100 -  {x}^{4} -  {18x}^{2}  - 81 -  -  -  - (a) }}

For the second largest inner triangle;

{ \tt{ {y}^{2} =  {7}^{2} +  {x}^{2}   }} \\ { \tt{ {y}^{2}  - = 49 +  {x}^{2}  -  -  -  - (b) }}

Equate (a) and (b):

{ \tt{100 -  {x}^{4}  - 18 {x}^{2} - 81 = 49 +  {x}^{2}  }} \\ { \tt{100 - 49 - 81 =  {x}^{4}  + 19 {x}^{2} }} \\ { \tt{ - 30 =  {x}^{2}( {x}^{2}   + 19x)}} \\ { \boxed{ \tt{for \:  \:  {x}^{2} =  - 30...imaginary \: value }}} \\ {\boxed{ \tt{for \:  \: ( {x}^{2} + 19x ) \:  =  - 30}}} \\ { \tt{ {x}^{2} + 19x + 30 = 0 }} \\ { \tt{}}

solve the equation to get values of x, which will give you y

7 0
1 year ago
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