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
Blababa [14]
2 years ago
6

Simplify: -15 + 23r + 9r^2 - 16r + 10

Mathematics
1 answer:
Diano4ka-milaya [45]2 years ago
8 0

Answer:

9r^2 + 7r - 5

Step-by-step explanation:

You might be interested in
Rounding to the nearest thousand 1243
Serjik [45]
It would be 1000 since the 2 is not bug enough to carry it over.
6 0
3 years ago
Read 2 more answers
A news station would like to conduct an exit poll to determine the likelihood that a highly debated amendment will receive enoug
vladimir1956 [14]

Answer:

The expression is n = (\frac{1.645*0.5}{0.03})^2

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

The margin of error is of:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

90% confidence level

So \alpha = 0.1, z is the value of Z that has a p-value of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

What expression would give the smallest sample size that will result in a margin of error of no more than 3 percentage points?

We have to find n for which M = 0.03.

We have no prior estimate for the proportion, so we use \pi = 0.5. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.03 = 1.645\sqrt{\frac{0.5*0.5}{n}}

0.03\sqrt{n} = 1.645*0.5

\sqrt{n} = \frac{1.645*0.5}{0.03}

(\sqrt{n})^2 = (\frac{1.645*0.5}{0.03})^2

n = (\frac{1.645*0.5}{0.03})^2

The expression is n = (\frac{1.645*0.5}{0.03})^2

3 0
3 years ago
Can someone smart help me with this question
Svetradugi [14.3K]

Answer:The answer is 7.62

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
The area of the rectangle in the figure is 24a2b3 square units. FIND the width of the rectangle
KonstantinChe [14]
I believe that the answer to this question would be 2(12a + b^3). Wait for someone else for clarification. :)
5 0
3 years ago
Shemika practices basketball for 2 hours each day
malfutka [58]

Answer:

whats your questionnnnn..???

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • 64, -48, 36, -27 which formula can be used to describe the sequence
    10·2 answers
  • What is the answer to the question
    9·1 answer
  • Allison earns a $40,000 base salary plus a commission equal to 15% of her total sales. If she sold $200,000 worth of goods, what
    8·1 answer
  • What is the value of x ?
    12·2 answers
  • Need help finding equation
    5·1 answer
  • A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boa
    6·1 answer
  • Help pls. I'm stuck I just need the answer
    8·1 answer
  • 15x= 19x-24. What kind of angle is this
    15·1 answer
  • A packing box is a rectangular prism with volume 2 m3.
    7·1 answer
  • Which equation represents a line parallel to the line shown on the graph?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!