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
Shkiper50 [21]
3 years ago
10

PLEASE HELP I AM STUCK ON THIS QUESTION! WILL GIVE BRAINLIEST FOR THE FIRST ANSWER!!! ALLOT OF POINTS!!!

Mathematics
2 answers:
natta225 [31]3 years ago
8 0

♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫

➷The answer is D.

When you look at all the steps, you need to see the name of the property and identify what it means.

associative property means you switch numbers around the parentheses

all the other equality ones are to cancel out.

There's a problem, there are no parentheses in step 1, instead, it should be commutative property of addition.

✽

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

DOGE

yarga [219]3 years ago
3 0

Answer:

Step 1

Step-by-step explanation:

Associative property of addition  is  The order of the parentheses.  There are no parentheses is this problem.  We are using the commutative property of addition which states we can change the order of the addends

You might be interested in
3^2∙3^n simplifies to 3^20
yan [13]
2*3=6
6*3.33=20
3^20
i hope that helps
4 0
3 years ago
Please assist me in my time of need.
vaieri [72.5K]

Answer:

I shall assist thee.

Step-by-step explanation:

Being me, I would say the answer is A. or B. But i'd prolly go with A tbh.

And oofers on me if this ain't what you need.

4 0
3 years ago
48 worksheets : 12 students. write yhe ratio as a fraction in simplest form.
Gennadij [26K]
48/12 = 24•2/6•2= 24/6= 12•2/3•2= 12/3= 4/1

In simplest form the ratio is
4 worksheets : 1 student
4 0
3 years ago
Suppose that a typical household in the United States has an average after-tax income of $41,100. The circle graph below represe
Zarrin [17]

Answer:

9% + 5%

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
According to a Yale program on climate change communication survey, 71% of Americans think global warming is happening.† (a) For
SpyIntel [72]

Answer:

a) 0.2741 = 27.41% probability that at least 13 believe global warming is occurring

b) 0.7611 = 76.11% probability that at least 110 believe global warming is occurring

Step-by-step explanation:

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

The expected value of the binomial distribution is:

E(X) = np

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

Normal probability distribution

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

When we are approximating a binomial distribution to a normal one, we have that \mu = E(X), \sigma = \sqrt{V(X)}.

In this problem, we have that:

p = 0.71

(a) For a sample of 16 Americans, what is the probability that at least 13 believe global warming is occurring?

Here n = 16, we want P(X \geq 13). So

P(X \geq 13) = P(X = 13) + P(X = 14) + P(X = 15) + P(X = 16)

In which

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 13) = C_{16,13}.(0.71)^{13}.(0.29)^{3} = 0.1591

P(X = 14) = C_{16,14}.(0.71)^{14}.(0.29)^{2} = 0.0835

P(X = 15) = C_{16,15}.(0.71)^{15}.(0.29)^{1} = 0.0273

P(X = 16) = C_{16,16}.(0.71)^{16}.(0.29)^{0} = 0.0042

P(X \geq 13) = P(X = 13) + P(X = 14) + P(X = 15) + P(X = 16) = 0.1591 + 0.0835 + 0.0273 + 0.0042 = 0.2741

0.2741 = 27.41% probability that at least 13 believe global warming is occurring

(b) For a sample of 160 Americans, what is the probability that at least 110 believe global warming is occurring?

Now n = 160. So

\mu = E(X) = np = 160*0.71 = 113.6

\sigma = \sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{160*0.71*0.29} = 5.74

Using continuity correction, this is P(X \geq 110 - 0.5) = P(X \geq 109.5), which is 1 subtracted by the pvalue of Z when X = 109.5. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{109.5 - 113.6}{5.74}

Z = -0.71

Z = -0.71 has a pvalue of 0.2389

1 - 0.2389 = 0.7611

0.7611 = 76.11% probability that at least 110 believe global warming is occurring

3 0
3 years ago
Other questions:
  • The equation y=5x2+6 is what kind of equation
    13·1 answer
  • Estimate Tim grew 4,799 carrots and nancy grew 3,699 carrots this year. Approximately how many carrots did they grow together?
    7·2 answers
  • Can i get step by step how to solve this problem.
    9·1 answer
  • Please find the perimeter!
    13·1 answer
  • Divide and simplify. (Type a whole number or a simplified​ fraction.)<br> 15/16 divided by 3/14
    11·2 answers
  • (PLEASE HELP ) A falcon flies 800,000 meters in 4 hours. Use the formula d = rt, where d represents distance, r represents rate,
    7·1 answer
  • The equation d=4 -1/15t represents your distance from home,d, for each minute you walk,t. If you graphed this equation, determin
    11·1 answer
  • Multiply each equation by a constant that would help to eliminate the y terms.
    9·1 answer
  • Of the pebbles that were measured which weight occurs the least?
    8·1 answer
  • Simplify 6⁢(3⁢x - 5) + 5⁢(2⁢x - 1).
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!