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
frozen [14]
3 years ago
15

9+10=21 true or false

Mathematics
2 answers:
Oksana_A [137]3 years ago
4 0

Answer:

False

Step-by-step explanation:

9+10=19. 10

+9

——

19

sergij07 [2.7K]3 years ago
3 0

Answer:

false

Step-by-step explanation:

9+10=19

You might be interested in
Rewrite each equation in slope-intercept form, if necessary. Then determine whether the lines are parallel. Explain,
Oksana_A [137]
Answer:
d

Step-by-step explanation:

Slope intercept form: y = mx + b

y = -x + 7
x + y = 21

x + y = 21
-x -x
y = -x + 21


y = -x + 7
y = -x + 21

Parallel lines have the same slope. Here, our slope is -1

Therefore, our final answer is d.


Hope this helps!
8 0
2 years ago
Suppose that you take a sample of 250 adults. If the population proportion of adults who watch news videos is 0.58​, what is the
aliina [53]

Answer:

0.36% probability that fewer than half in your sample will watch news​ videos

Step-by-step explanation:

To solve this question, i am going to use the binomial approximation to the normal.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

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:

n = 250, p = 0.58

So

\mu = E(X) = 250*0.58 = 145

\sigma = \sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{250*0.58*0.42} = 7.80

If the population proportion of adults who watch news videos is 0.58​, what is the probability that fewer than half in your sample will watch news​ videos

Half: 0.5*250 = 125

Less than half is 124 or less

So this is the pvalue of Z when X = 124

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

Z = \frac{124 - 145}{7.8}

Z = -2.69

Z = -2.69 has a pvalue of 0.0036

0.36% probability that fewer than half in your sample will watch news​ videos

8 0
3 years ago
Read 2 more answers
a man steals 500naira from a shop,then bought an items worth 200naira collect 300naira change.how much does the shop keeper lose
Liono4ka [1.6K]
Aaaaaaaaaaaaaasssssssssssssssuiiiiiiiiiiiiiyyyyyyyyyyyyyyaaaaaaaaaaaaxrgcghgg%%%%%%%
5 0
3 years ago
Can someone double check me???
kvv77 [185]
You’re correct I think
8 0
3 years ago
mrs Moore worked 42 hours and 35 minutes last week. How many hours and minutes did she average in each of the five days?
il63 [147K]

Answer:

6.08333333 hours

Step-by-step explanation:

((42 hours) + (35 minutes)) / 7 = 6.08333333 hours

hope this helps LOL :)

8 0
3 years ago
Read 2 more answers
Other questions:
  • Issue:
    12·2 answers
  • What is 10 dived by 5 thirteenths
    14·1 answer
  • What is the average of 55 64 60 and 61
    13·2 answers
  • 2/5 of the instruments in the marching band are brass one third or percussion and the rest are wood ones 1/8 of the brass instru
    14·1 answer
  • A scientist placed fish eggs in a tank. Each day, twice the number of eggs from the previous day hatch. The expression 5 times 2
    14·2 answers
  • If a cow takes 15 poops a day, and there is 10 cows, how many piles of poop are there in a day.
    8·2 answers
  • Use pemdas (23 + 11) / 2 - 14 write 3 steps
    13·2 answers
  • Is the statement “ for a set of whole numbers, the longest numeral will belong to the largest number” true or false? Why?
    9·1 answer
  • Solve and will mark brainliest
    7·1 answer
  • Find the equation of the line that passes through (1,3) and is perpendicular to y = 1 − 2 x . Leave your answer in the form y =
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!