1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
grin007 [14]
3 years ago
9

Plz help i will give brainliest

Mathematics
1 answer:
slava [35]3 years ago
7 0

Answer:

i am kinda unsure butfirst do 2x divided by 3 and go from there

Step-by-step explanation:

You might be interested in
Suppose the speeds of cars along a stretch of I-40 is normally distributed with a mean of 70 mph and standard deviation of 5 mph
neonofarm [45]

Answer:

a) 68%.

b) 84%.

c) Approximately 2.5% of cars are traveling at a speed greater than or equal to 80 mph.

d) Approximately 2.5% of cars are traveling at a speed greater than or equal to 80 mph.

e) Between 60 mph and 80 mph.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean of 70 mph, standard deviation of 5 mph.

(a) Approximately what percent of cars are travelling between 65 and 75 mph?

70 - 5 = 65

70 + 5 = 75

Within 1 standard deviation, so approximately 68%.

(b) If the speed limit on this stretch of highway is 65 mph, approximately what percent of cars are traveling faster than the speed limit?

The normal distribution is symmetric, which means that 50% of the measures are below the mean, and 50% are above.

65 is one standard deviation below the mean, so of the cars below the mean, 68% are above 65 mph.

0.68*50% + 50% = 34% + 50% = 84%.

84%.

(c) What percent of cars are traveling at a speed greater than or equal to 80 mph?

80 = 70 + 2*10

2 standard deviations above the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean. Due to the symmetry of the normal distribution, of the other 5%, 2.5% is at least 2 standard deviations below the mean and 2.5% is at least 2 standard deviations above the mean. Then:

Approximately 2.5% of cars are traveling at a speed greater than or equal to 80 mph.

(d) What percent of cars are traveling at a speed greater than 80 mph?

Same as item c, as in the normal distribution, the probability of an exact value is considered to be 0.

(e) 95% of cars are traveling between what two speeds?

Within two standard deviations of the mean.

70 - 2*5 = 60 mph

70 + 2*5 = 80 mph.

Between 60 mph and 80 mph.

6 0
3 years ago
un carro que se mueve con velocidad constante recorre 120 km en 75 minutos,¿en que tiempo recorrera el carro una distancia de 20
Ivan

Answer:

320 minutos

Step-by-step explanation:

4 0
3 years ago
If y = 100 when x = 15, which equation could you use to find the value<br> of k?
mario62 [17]

Answer:

y+x=k

Step-by-step explanation:

3 0
3 years ago
What is the product (4x)( -3x^6)(-7x^3)
11111nata11111 [884]

Answer:

  84x^10

Step-by-step explanation:

The coefficients multiply, and the exponents add.

  (4x)( -3x^6)(-7x^3) = (4)(-3)(-7)x^(1+6+3) = 84x^10

__

The rule for exponents is ...

  (x^a)(x^b) = x^(a+b)

7 0
3 years ago
If a aquadrilateral is equiangular, then it coul be a .....
kupik [55]

Answer:

Square

Answer A is correct

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which components are a possible representation of vector u if ||-4u|| ≈ 14.42?
    14·1 answer
  • the tangent to curve y = 2x / x - 1 which is not equal to1, at the point (2,4) and the normal to the same curve at the point (3,
    7·1 answer
  • Please help me it urgent find the total area.
    6·1 answer
  • How do i solve this equation for x? 6e^2x=7e^4x
    14·1 answer
  • I think of a number, multiply it by 4, subtract 6 and then divide by 5. If the answer is 10, what is the original number?
    10·1 answer
  • The first term of a geometric series is -3, the common ratio is 6, and the sum of the series is -4,665 Using a table of values,
    9·2 answers
  • Charlie is saving for a new computer desk. The table costs $70. So far, she has already saved $35/ Write an equation to show how
    11·1 answer
  • Can someone please help me?
    8·1 answer
  • Part a.) If you apply the distributive property first to solve the equation, what operation will you need to do last?
    9·2 answers
  • an outdoor pavilion has 30 rows with 20 seats in the first row each row thereafter has 6 more seats using a formula find the tot
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!