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UNO [17]
2 years ago
13

What is the value of y = 7 – 2c when x =4? When x = 4, y =?

Mathematics
1 answer:
Effectus [21]2 years ago
3 0
The y -intercept of the graph of an equation is the y -coordinate of the point in the xy -plane where the graph intersects the y -axis. Thus the y -intercept can be found by setting x = 0
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Problem 1.(32 points) A random sample of 100 Uber rides in Chicago has on average 5.4miles per ride. Assume the distribution of
marshall27 [118]

Answer:

a) CI = ( 5,1 ; 5,7 )

b) SE =  0,1  

Step-by-step explanation:

a) Sample random     n  = 100

Mean  =  μ = 5,4

Standard deviation   s = 1,3

CI = 99 %    α = 1 %   α = 0,01     α/2 =  0,005

z(c) for  0,005 is from z-table    z(c)  = 2,575

z(c)  =  ( X - μ ) /s/√n          CI  =  μ ± z(c) * s/√n

CI =  5,4 ± 2,575* 1,3/10

CI = 5,4 ± 0,334

CI = ( 5,1 ; 5,7 )

b) SE = Standard deviation / √n

SE = 1,3 /10       SE =  0,1  

We can support that with 99 % of probability our random variable will be in the CI.

6 0
2 years ago
4x^2-400=0<br><br> square roots and solving quadratics
posledela

Answer:

x = ±10

Step-by-step explanation:

4x² - 400 = 0

Add 400 to both sides

4x² = 400

Divide both sides by 4

x² = 100

Take the square root of both sides

x = ±10

8 0
3 years ago
Help me plz I’ve never been good with math
S_A_V [24]
Its 16.

So you have 12 miles on that trail, and markers every 2/3 of the way there. If you were to divide 2 with 3 then you can get the decimal of the fraction. Which in this case it’s 0.75. So every single 0.75 of the mile there is a marker. Divide 12 with 0.75 and you get 16 markers.


Hoped this helped in some way.
4 0
3 years ago
Question 4 pls thanks, I will mark Brainliest
xxTIMURxx [149]

the second one.

Step-by-step explanation:

sjisidjdododpdpddod

6 0
3 years ago
3(5 - 2x) + 2(x-3) plz help me quick:(
trasher [3.6K]

Answer:

9-4x is simplified

Step-by-step explanation:

hope this helps

7 0
3 years ago
Read 2 more answers
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