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Sonbull [250]
4 years ago
7

I really need help with this i posted the wrong one last time asap thank you!

Mathematics
1 answer:
Amiraneli [1.4K]4 years ago
5 0

Answer:

Center: (2,-3) Radius: 4

Step-by-step explanation:

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HELP PLZ GIVING 15 POINTS
mario62 [17]

Answer:

she has 20% emails still unread wich is b

Step-by-step explanation:

5 0
3 years ago
The equation x2 – 1x – 90 = 0 has solutions {a, b}. What is a + b
Andrews [41]
X^2 - x - 90 =0
This equation is in standard form ax^2+ bx + c
The sum of the solutions is -b/a (a and b are the coefficients from the equation above, not the solutions to the equation)
The answer is 1/1 = 1
8 0
3 years ago
Read 2 more answers
How many people in a car? A study of rush-hour traffic in San Francisco counts the number of people in each car entering a freew
emmasim [6.3K]

Answer:

a) No. It is not normal.

b) The probability that 700 randomly selected cars at this freeway entrance will carry more than 1075 people is 0.104

Step-by-step explanation:

<u>(a) Could the exact distribution of the count be Normal?</u>

The exact distribution of the number of people in each car entering a freeway at a suburban interchange is not normal. Because the count is <em>discrete </em>and <em>can assume values bigger or equal to one</em>.

<u>(b) The probability that 700 randomly selected cars at this freeway entrance will carry more than 1075 people.</u>

The probability we seek is the cars carrying people with mean more than \frac{1075}{700}=1.5357

That is P(z>z*) where z* is the z-score of 1.5357.

z* can be calculated using the equation:

z*=\frac{X-M}{\frac{s}{\sqrt{N} } } where

  • X is the mean value wee seek for its z-score (1.5357)
  • M is the average count of people entering a freeway at a suburban interchange. (1.5)
  • s is the standard deviation of the count (0.75)
  • N is the sample size (700)

Thus z*=\frac{1.5357-1.5}{\frac{0.75}{\sqrt{700} } } ≈ 1.26

We have P(z>1.26)=1-P(z≤1.26)= 1-0.896 = 0.104

5 0
3 years ago
A rectangular rug is 12.5 and 10 the rug needs to be reduced by the scale factor of 1/5 to be placed near a door.what is thearea
Murrr4er [49]

12.5 * 10 = 125 square feet (ORIGINAL RUG)

2.5 * 2 = 5 square feet (SCALED RUG)

or

10 * 8 = 80 square feet (SCALED RUG)

Its one of these, you didnt provide enough info to get one answer. Hope this helped though!

6 0
3 years ago
1.1
Darina [25.2K]

Answer:

The nth term of the arithmetic sequence is;

90 - 3n

Step-by-step explanation:

Here, we want to find an expression for the nth term of the sequence

Mathematically, let us determine the type of sequence

As we can see;

84 - 87 = 81-84 = -3

The difference between the terms is a constant; this means that the sequence is arithmetic

The nth term of an arithmetic sequence can be represented by;

Tn = a + (n-1)d

in this case, a is the first term of the sequence = 87

d is the common difference of the sequence = -3

The nth term is thus;

Tn = 87 + (n-1)-3

Tn = 87 - 3n + 3

Tn = 87 + 3 - 3n

Tn = 90 - 3n

7 0
3 years ago
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