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
Kaylis [27]
3 years ago
15

Which statements are true about the expression

Mathematics
1 answer:
bazaltina [42]3 years ago
6 0

Answer:

Wheres the question?

You might be interested in
Given sin r = 0.5, what is cos r?
Vera_Pavlovna [14]

Answer:

0.877 but rounded it will be 0.88

8 0
3 years ago
The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.26 degrees. If we want to be 90% c
siniylev [52]

Answer:

19 beers must be sampled.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.9}{2} = 0.05

Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

That is z with a pvalue of 1 - 0.05 = 0.95, so Z = 1.645.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

The population standard deviation for the temperature of beers found in Scooter's Tavern is 0.26 degrees.

This means that \sigma = 0.26

If we want to be 90% confident that the sample mean beer temperature is within 0.1 degrees of the true mean temperature, how many beers must we sample?

This is n for which M = 0.1. So

M = z\frac{\sigma}{\sqrt{n}}

0.1 = 1.645\frac{0.26}{\sqrt{n}}

0.1\sqrt{n} = 1.645*0.26

\sqrt{n} = \frac{1.645*0.26}{0.1}

(\sqrt{n})^2 = (\frac{1.645*0.26}{0.1})^2

n = 18.3

Rounding up:

19 beers must be sampled.

7 0
3 years ago
Given functions f and g, find f-g.
Eva8 [605]

Answer:

-5x-5

Step-by-step explanation:

original functions:

f(x)=3x-8\\g(x)=8x-3

Subtract the polynomials:

f(x)-g(x) = (3x-8) - (8x-3)

Distribute the negative sign:

3x-8-8x+3

Combine like terms:

(3x-8x)+(-8+3)

Add like terms:

-5x-5

5 0
2 years ago
What are the vertical angles
wariber [46]
It’s the bottom left answer because the angles are opposite of each other. They are also congruent. I hope this helps!
8 0
3 years ago
Read 2 more answers
What are the coordinates grapging x=3 and y=-2x+1
marusya05 [52]
Answer: -5

First, coordinates are (x, y). You’re x is 3, so all you need to do it plug in x into your algebraic equation to find y. Then just plug both into (x, y) and you have your coordinates.

y=-2(3)+1
y=-6+1
y=-5
7 0
3 years ago
Other questions:
  • Select all ratios equivalent to 21:14.<br> 14:10, 8:4, 9:6, 12:21
    12·1 answer
  • ......... anyone will y’all help
    15·1 answer
  • What value of k makes the equation true?<br><br> a.2<br> b.3<br> c.4<br> d.8
    9·1 answer
  • What is the decimal form of 8 and 39/40
    12·2 answers
  • an airplane is 180 feet long. blake makes a scale model of the airplane 1:45 of its actual size. how long is the airplane
    9·1 answer
  • In making a fruit punch for a party, you mixed 1⁄2 gallon of grape juice with 3⁄4 gallon of orange juice. How many gallons of pu
    6·2 answers
  • Math triangle fun please help!
    14·2 answers
  • PLS HELP ASAP 30 POINTS
    15·1 answer
  • Given m||n, find the value of (x+12) 4x-7)°
    6·1 answer
  • Find the least common denominator (LCD) of
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!