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
soldier1979 [14.2K]
2 years ago
8

Evaluate, leave ur answer in index form. 2³ × 2^-1​

Mathematics
1 answer:
vitfil [10]2 years ago
3 0

Multiply = add powers

3 + - 1 = 2

- - means +

+ + means +

- + means -

Thus, answer is 2^2

Hope this helps!

You might be interested in
Crop researchers plant 15 plots with a new variety of corn. The yields in bushels per acre are: 138.0 139.1 113.0 132.5 140.7 10
son4ous [18]
There is a relationship between confidence interval and standard deviation:
\theta=\overline{x} \pm \frac{z\sigma}{\sqrt{n}}
Where \overline{x} is the mean, \sigma is standard deviation, and n is number of data points.
Every confidence interval has associated z value. This can be found online.
We need to find the standard deviation first: 
\sigma=\sqrt{\frac{\sum(x-\overline{x})^2}{n}
When we do all the calculations we find that:
\overline{x}=123.8\\ \sigma=11.84
Now we can find confidence intervals:
($90\%,z=1.645): \theta=123.8 \pm \frac{1.645\cdot 11.84}{\sqrt{15}}=123.8 \pm5.0\\($95\%,z=1.960): \theta=123.8 \pm \frac{1.960\cdot 11.84}{\sqrt{15}}=123.8 \pm 5.99\\ ($99\%,z=2.576): \theta=123.8 \pm \frac{2.576\cdot 11.84}{\sqrt{15}}=123.8 \pm 7.87\\
We can see that as confidence interval increases so does the error margin. Z values accociated with each confidence intreval also get bigger as confidence interval increases.
Here is the link to the spreadsheet with standard deviation calculation:
https://docs.google.com/spreadsheets/d/1pnsJIrM_lmQKAGRJvduiHzjg9mYvLgpsCqCoGYvR5Us/edit?usp=sharing
6 0
3 years ago
-3.8x - 5.9x = 223.1
katrin2010 [14]

Answer:

x=-23

Step-by-step explanation:

-3.8x-5.9x=223.1

-9.7x=223.1

x=223.1/-9.7

x=-23

5 0
3 years ago
Read 2 more answers
Which equation matches the grpah? A.y = - 1/2x B.y = 1/2x C. y = 2x D. y = -2x
My name is Ann [436]

Answer: it is c all u have to do seach up desmos in put in the graph promblem is will show u the answer

Step-by-step explanation:

3 0
3 years ago
74.94×103= <br> because the number 10³ has ?<br> zeros when it is written without an exponent.
horsena [70]

Answer:

74940, three

Step-by-step explanation:

74.94 × 10³

74.94 × 1000

74940

6 0
3 years ago
What are the two equations that need to be solved to find the solutions for the absolute value equation |x-5|=x-2
Allushta [10]

Answer:

x - 5 = x - 2   and

x - 5 = 2 - x.

Step-by-step explanation:

x - 5 may be positive or negative so we have:

x - 5 = x - 2  

and

x - 5 = - (x  - 2)

x - 5 = 2 - x.

6 0
3 years ago
Other questions:
  • What is the square root of four hundred fifty six
    15·2 answers
  • The original price of an airplane ticket is $990. How much will Hazel pay if she buys it during the 20% off sale?
    7·1 answer
  • For the most recent year available, the mean annual cost to attend a private university in the United States was $20,307. Assume
    7·1 answer
  • 7-3x+2= please answer​
    10·2 answers
  • Solve the equation -16(2x-8)-(18x-6)= -12+2(6x-6).​
    8·1 answer
  • Which of the following items are allowed in a class 5 clean room:
    11·1 answer
  • What is the equation of the line through the origin and (-5, 6)?
    15·1 answer
  • Help .?.??.?.?..??.?.?.?.??.?.?.?.?.?.?,?.?.??
    12·1 answer
  • List the first four terms of the sequence.
    9·1 answer
  • Fuel for the reasearch vessels will be stored in a cylindrical tank with a radius of 10 meters and a height of 5 meters. Using a
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!