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
ohaa [14]
3 years ago
10

Help please..................

Mathematics
2 answers:
vfiekz [6]3 years ago
7 0
Answer: 27.987
Explanation: if x is 10.9 then you start with 0.207+2.1^3(10.9-7.9). You start with (10.9-7.9) because it’s in parentheses (PEMDAS) so 10.9-7.9=3 then you do 2.1^3= 9.26 now you have 0.207+9.26*3 so you multiply 9.26*3=27.78 finally you have 0.207+27.78= 27.987
s2008m [1.1K]3 years ago
4 0

Answer:

27.99

Step-by-step explanation:

Please give me brainliest :)

You might be interested in
If 818=8,707=5,452=2,1247=?​
kozerog [31]

Answer:

the answer is(5)

Step-by-step explanation:

4 0
3 years ago
The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day.
valina [46]

Answer:

A sample of 179 is needed.

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 - 0.85}{2} = 0.075

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.075 = 0.925, so Z = 1.44.

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.

A previous study found that for an average family the variance is 1.69 gallon?

This means that \sigma = \sqrt{1.69} = 1.3

If they are using a 85% level of confidence, how large of a sample is required to estimate the mean usage of water?

A sample of n is needed, and n is found for M = 0.14. So

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

0.14 = 1.44\frac{1.3}{\sqrt{n}}

0.14\sqrt{n} = 1.44*1.3

\sqrt{n} = \frac{1.44*1.3}{0.14}

(\sqrt{n})^2 = (\frac{1.44*1.3}{0.14})^2

n = 178.8

Rounding up

A sample of 179 is needed.

7 0
3 years ago
X x X x X x Y x Y x Y  find will power​
Vladimir79 [104]

Answer:

x^3y^3

Step-by-step explanation:

x^3(y^3)\\x^3y^3

3 0
3 years ago
Classify the following triangle. Check all that apply
konstantin123 [22]

D and E

the triangle is right as it has a right angle as one of the 3 angles

the triangle is isosceles as it has 2 equal sides , indicated by the score on the equal sides and 2 equal base angles of 45°


8 0
3 years ago
Read 2 more answers
Two different box-filling machines are used to fill cereal boxes on an assembly line. The critical measurement influenced by the
defon

Answer:

0.1981

Step-by-step explanation:

See attachment for calculation

5 0
3 years ago
Other questions:
  • A trapezoid has an area of 33.6 square cm and a height of 4 centimeters.
    6·1 answer
  • What is the slope of the line joining (-4,7) and (-5,0)?
    6·2 answers
  • A teacher wants to buy supplies for two of their students, Susie and John. This teacher wants to spend at least $5 on each stude
    10·1 answer
  • Teresa is maintaining a camp fire. She can keep the fire burning for 444 hours with 666 logs. She wants to know how many logs (y
    9·2 answers
  • 4+2i/2−i solve for this expression​
    10·1 answer
  • Marty and Juan took turns driving a cargo truck. The ratio of the miles Marty drove to the miles Juan drove is 6 to 7. Juan drov
    15·1 answer
  • In similar polygons, corresponding angles should not have equal measures.<br> True or false
    13·1 answer
  • Ms.Perkins predicted that 20% of the days in March would have temperatures below freezing. How many days does she predict will j
    8·1 answer
  • Caroline took a math test and got 15 out of 25 correct. What was the percent of questions she got
    10·2 answers
  • HELP PLEASE I NEED THIS DONE ASAP PLUS BRAINLIEST
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!