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
Natalija [7]
3 years ago
9

Six times the sum of a number and twelve is forty.

Mathematics
2 answers:
Nitella [24]3 years ago
5 0
The answer is C Hope this helps!!
Dmitry_Shevchenko [17]3 years ago
3 0
The answer is B i think.......
You might be interested in
Help me solve on number 5 and 6 (solve for x)
Lena [83]

Answer:

5.) 39

6.) 52

Step-by-step explanation:

5.) 90-51= 39

6.) 74 + 34= 108

180-108= 72

56+72= 128

180-128= 52

x=52

5 0
3 years ago
In a study researchers reported the mean BMI for men 60 and older to be 24.7 with a standard deviation of 3.3 and the mean BMI f
erica [24]

Answer:

Probability that the difference in the mean BMI (men-women) for 45 women and 50 men selected independently and at random will exceed 2.1 = 0.2451

Step-by-step explanation:

The central limit theorem helps us to obtain the mean and the standard deviation of any sampling distribution.

Given that the sample was obtained from a normal distribution or an approximately normal distribution & it was obtained using random sampling techniques with each variable independent of one another and with each sample with adequate sample size,

Mean of sampling distribution (μₓ) = Population mean (μ)

Standard deviation of the sampling distribution = σₓ = (σ/√N)

where σ = population mean

N = Sample size

For the 45 women

μₓ = μ = 23.1

σₓ = (σ/√N) = (3.7/√45) = 0.552

For the 50 men

μₓ = μ = 24.7

σₓ = (σ/√N) = (3.3/√50) = 0.467

To find the probability that the difference in the mean BMI (men-women) for 45 women and 50 men selected independently and at random will exceed 2.1, we need to combine the distributions.

New distribution = (BMI of men) - (BMI of women) = x = X₁ - X₂

When independent distributions are combined, the combined mean and combined variance are given through the relation

Combined mean = Σ λᵢμᵢ

(summing all of the distributions in the manner that they are combined)

Combined variance = Σ λᵢ²σᵢ²

(summing all of the distributions in the manner that they are combined)

λ₁ = 1, λ₂ = -1

μ₁ = 24.7, μ₂ = 23.1

σ₁ = 0.467, σ₂ = 0.552

Combined mean = (Mean of men) - (Mean of women) = 24.7 - 23.1 = 1.6

Combined Variance = (1²×0.467²) + [(-1)²×(0.552²)] = 0.522793

Combined standard deviation = √0.522793 = 0.723

Probability that the difference in the mean BMI (men-women) for 45 women and 50 men selected independently and at random will exceed 2.1 = P(x > 2.1)

Note that the resulting distribution from the combination of distributions is still a normal distribution since the distributions combined were normal distributions too.

Hence, we first normalize or standardize 2.1

The standardized score for any value is the value minus the mean then divided by the standard deviation.

z = (x - μ)/σ = (2.1 - 1.6)/0.723 = 0.69

To determine the required probability

P(x > 2.1) = P(z > 0.69)

We'll use data from the normal distribution table for these probabilities

P(x > 2.1) = P(z > 0.69) = 1 - P(z ≤ 0.69)

= 1 - 0.7549

= 0.2451

Hope this Helps!!!

6 0
3 years ago
What Is The Probability That The Spinner Will Land On Either Yellow (Y) Or Green (G)?
Sholpan [36]
2/3.
the spinner has 4/6 parts that are y and g, and that simplifies down to 2/3
4 0
2 years ago
Read 2 more answers
What is the definition of square root?
Mariana [72]
A square root is a number that produces a specific number when multiplied by itself. Basically it's the same number multiplied by itself.
hope this helps:)
6 0
3 years ago
Read 2 more answers
Solve.<br> -3/4- 4/3 = <br> Aswdfeghrjkt
Ghella [55]
-25/12


You have to change the denominator the the least common multiple then multiply the numerator by the number you multiplied it’s denominator with.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Help me please! I'm so terrible at math
    6·2 answers
  • A quarter circle is attached to the side of a square as shown.
    12·1 answer
  • The expression log1/3/log2 is the result of applying the change of base formula to a logarithmic expression. Which could be the
    15·2 answers
  • Y/a −b= y/b −a, if a≠b<br><br> solve for y
    8·1 answer
  • During one day, the value of a stock lost
    8·1 answer
  • Help ! not sure what do do
    10·1 answer
  • At Buffalo Mild Wings, the price of chicken wings depends on the number of wings that you order.
    5·1 answer
  • 3/4n =3 without combining like terms​
    5·1 answer
  • Consider points R, S, and T.
    5·2 answers
  • What is 9 − 9z in Distributive Property! :D
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!