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Alex
3 years ago
13

A survey concluded that 60% of cars going through the Lomonosov street encounters traffic jam. After installing a new traffic li

ghts, a random sample of 2500 cars was found to contain 1462 cars encountered traffic jam. Have the new installed traffic lights had any effect? State your conclusion with 0.05 level of significance
Mathematics
2 answers:
Mkey [24]3 years ago
6 0

Yes, the new traffic lights have had an effect, as only 58.48% of surveyed cars had encountered a traffic jam, compared to 60% before the installation of the traffic lights.

erastovalidia [21]3 years ago
3 0

Answer:

Close encounters. AI can help city officials manage traffic by counting how many moving vehicles travel down a road and identifying close encounters between vehicles and pedestrians. Courtesy TACC.

Step-by-step explanation:

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How would i answer this?​
Lelu [443]

9514 1404 393

Answer:

  y = (x -1)² -16

Step-by-step explanation:

Note the location of the vertex (point A) on the graph. Its x-coordinate is readily identifiable as 1. Its y-coordinate is some value between -15 and -20, closer to -15. (If you go to the trouble of finding the vertex coordinates, you discover they are (1, -16).)

Once you have determined what the vertex is, you can compare the offered answer choices to the vertex form ...

  y = (x -h)² +k

where (h, k) are the vertex coordinates. That is, you are looking for an answer choice that is something like ...

  y = (x -1)² -16

3 0
2 years ago
The temperature is −18.2 Celsius in South Dakota and -9.7 Celsius Minnesota. Which one of the following inequalities correctly c
andrezito [222]

Answer:

A and A

Step-by-step explanation:

please mark brainliest.

6 0
2 years ago
Read 2 more answers
A rectangle has a perimeter of (20x+12y). If one side of the rectangle is (3x-4y), write the expression for the other side
Nady [450]

Answer:

(7x + 10y)

Step-by-step explanation:

To find this add (3x - 4y) to itself to calculate to lengths of the shorter sides.

(3x - 4y) + (3x - 4y) = 6x - 8y

Subtract this from (20x + 12y)

(20x + 12y) - (6x - 8y) = 14x + 20y     Divide this by two to get the length of one side

14x + 20y / 2 = 7x + 10y

If this answer is correct, please make me Brainliest!

3 0
3 years ago
4(PX+1)=64 what is the value of x in terms of p and what is the value of x when p is -5 ?
Oksana_A [137]

Answer:

x = -3

Step-by-step explanation:

4(PX+1)=64\\\\p= -5

Substitute -5 for p in the given equation and solve

4(-5(x)+1)=64\\\\\mathrm{Divide\:both\:sides\:by\:}4\\\frac{4\left(-5x+1\right)}{4}=\frac{64}{4}\\\\Simplify\\-5x+1=16\\\\\mathrm{Subtract\:}1\mathrm{\:from\:both\:sides}\\-5x+1-1=16-1\\\\Simplify\\-5x =15\\\\\mathrm{Divide\:both\:sides\:by\:}-5\\\frac{-5x}{-5}=\frac{15}{-5}\\\\Simplify\\x = -3

4 0
2 years ago
PLEASE ANSWER brainlest!
TiliK225 [7]
-24 - I didn’t explain it in words, but the step by step is in the image!

5 0
2 years ago
Read 2 more answers
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