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
pentagon [3]
3 years ago
15

Please answer these for me <3

Mathematics
1 answer:
gtnhenbr [62]3 years ago
6 0

8-21

9- -16 i think lemme do the next ones

You might be interested in
I'M OFFERING 20 POINTS AND BRAINLIEST ANSWER FOR HELP
Hoochie [10]
1$ is 100cents
45$ is 4500 cent
THE ORIGINAL price is $53
if 85% = $45
so 15%= ? cross multiply
45x15=85x$
675/85=x$
7.9 app8$ was discounted 
original price=45+8=$53
in cent it is 5300 cents



6 0
3 years ago
climate scientists use computer models to predict the likely change in global average temperature under various assumptions abou
Free_Kalibri [48]

Answer:

\fbox{\begin{minipage}{10em}Option A: Simulation \end{minipage}}

Step-by-step explanation:

The data is not collected from the world outside, but a computer.

=> The data can be generated under assumption from simulation only.

=> Option A is correct.

Hope this helps!

:)

5 0
3 years ago
Read 2 more answers
In a sample of 1000 cases, the mean of a certain test is 14 and the standard deviation is 2.5. Assume the distribution to be nor
Maslowich

Answer:

The top 20% of the students will score at least 2.1 points above the mean.

Step-by-step explanation:

When the distribution is normal, we use 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.

The mean of a certain test is 14 and the standard deviation is 2.5.

This means that \mu = 14, \sigma = 2.5

The top 20% of the students will score how many points above the mean

Their score is the 100 - 20 = 80th percentile, which is X when Z has a pvalue of 0.8. So X when Z = 0.84.

Their score is:

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

0.84 = \frac{X - 14}{2.5}

X - 14 = 0.84*2.5

X = 16.1

16.1 - 14 = 2.1

The top 20% of the students will score at least 2.1 points above the mean.

7 0
2 years ago
Y = x3 - 3x On which intervals is this function increasing?
iris [78.8K]
The function is increasing on the intervals
  x ∈ (-∞, -1) ∪ (1, ∞)

5 0
3 years ago
On one day a rickshaw puller earned 80.out of his earning he spent 68÷5 on tea and snacks,51÷2 on food and 22÷5 on repair of the
Alexeev081 [22]
Answer: $56.50
==================================
(instead of dividing each of them individually and them subtracting them one by one, combine them together as a fraction first and then subtract)

80 - (68/5 + 51/2 + 22/5)
= 80 - (136/10 + 255/10 + 44/10)
= 80 - (435/10)
= 80 - 43.5
= 56.5

He saved $56.50 on that
7 0
3 years ago
Other questions:
  • I need help with 14 and 16 please!!!!
    5·1 answer
  • Which of the following is an undefined term in geometry?
    10·1 answer
  • 2/3 of all your books are fiction. 1/6 of those are historical fiction. What fraction of all your books are historical fiction?
    7·1 answer
  • Solving quadratic equations with complex solutions x2 + 4x + 8 = 0.
    10·1 answer
  • If jayla has 5 scrunchies . Jazmine has 2 less than twice the number of scrunchies jayla has . How many scrunchies do they have
    14·1 answer
  • The value of a precious gem stone has increased at a rate of 120% each year. If the gems's value started at $50 in 1920, how muc
    5·1 answer
  • The bike store marks up the wholesale cost of all of the bikes they sell by 30%. Andre wants to buy a bike that has a price tag
    11·1 answer
  • The length and width of a rectangle are in the ratio 5:3. The perimeter of the rectangle is 32 cm. Find the length and width.
    11·1 answer
  • Need help as soon as possible
    15·1 answer
  • In which type of statistical study is the population influenced by researchers? A. experiment B. Researchers do not influence th
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!