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
Alexus [3.1K]
3 years ago
7

Simplify the following expression.

Mathematics
1 answer:
Katyanochek1 [597]3 years ago
3 0
Where is the expression?
You might be interested in
A radar is designed to report the track of an aircraft every 2 seconds. If this radar reports 15 reports 15 tracks in one minute
meriva

Answer:

Step-by-step explanation:

Since radar reports 30 tracks in one minute in which 60 seconds makes 1 minute

Let calculate using this formula

Using this formula

Percentage of time=Tracks reported in minutes/60 seconds*100

Let plug in the formula

Percentage of time=30 tracks/60 seconds*100

Percentage of time=0.5*100

Percentage of time=50%

Inconclusion The percentage of the time that  radar track the aircraft is 50%

5 0
3 years ago
Read 2 more answers
A population is known to be normally distributed with a standard deviation of 2.8. (a) Compute the 95% confidence interval on th
Ugo [173]

Answer:

Step-by-step explanation:

Mean = sum of terms/number of terms

The mean of the given sample is

(8 + 9 + 10 + 13 + 14 + 16 + 17 + 20 + 21)/9 = 14.2

a)

For a confidence level of 95%, the corresponding z value is 1.96.

We will apply the formula

Confidence interval

= mean ± z ×standard deviation/√n

Where

n represents the number of samples

It becomes

14.2 ± 1.96 × 2.8/√9

= 14.2 ± 1.96 × 0.933

= 14.2 ± 1.83

The lower end of the confidence interval is 12.37

The upper end of the confidence interval is 16.03

b)

For a confidence level of 99%, the corresponding z value is 2.58

We will apply the formula

Confidence interval

= mean ± z ×standard deviation/√n

Where

n represents the number of samples

It becomes

14.2 ± 2.58 × 2.8/√9

= 14.2 ± 2.58 × 0.933

= 14.2 ± 2.4

The lower end of the confidence interval is 11.8

The upper end of the confidence interval is 16.6

3 0
2 years ago
PLEASE HELP I ONLY HAVE AN HOUR ​
skelet666 [1.2K]

Answer:

A. I can't quite see the question, but I'm pretty sure it's A

Step-by-step explanation:

Sin(A) = 1/3

Sin^2(A) + Cos^2(A) = 1

(1/3)^2 + cos^2(A) = 1

1/9 + cos^2(A) = 1

cos^2(A) = 1 - 1/9

cos^2(A) = 8/9

cos(A) = √(8/9)

√8 = √(2 * 2 * 2) = 2√2

√9 = 3

cos(A) = 2√2/3

4 0
2 years ago
The sum of the polynomials 6x3 + 8x2 – 2x + 4 and 10x3 + x2 + 11x + 9 is
faltersainse [42]

Answer:

16x^2 + 9x^2 + 9x + 13.

Step-by-step explanation:

6x^3 + 8x^2 – 2x + 4 +10x^3 + x^2 + 11x + 9

Bringing like terms together:

= 6x^3 + 10x^3 + 8x^2 + x^2 - 2x + 11x + 4 + 9

= 16x^2 + 9x^2 + 9x + 13.  (answer).

4 0
3 years ago
What two numbers divide to leave a remainder of 2?
gavmur [86]
A number that is 2 more than the other but the smaller one is not even

example
9 divided by 7 or 18 divided by 7
3 0
3 years ago
Other questions:
  • Lin is tracking the growth of her plant. today the plant is 5 cm high. the plant grows 1.5 cm per day. write an equation that re
    5·1 answer
  • Can anyone figure this out?
    5·1 answer
  • What does equation mean ?
    7·2 answers
  • Calculate the area of this triangle 18cm 11cm 14cm
    15·2 answers
  • A car passes a landmark on a highway traveling at a constant rate of 45 kilometers per hour. One hour later, a second car passes
    12·2 answers
  • During a manufacturing process, a metal part in a machine is exposed to varying temperature conditions. The manufacturer of the
    5·2 answers
  • 1.5<br> For use after Le<br> Divide, if possible.<br> 1. 3+ (-1)
    7·2 answers
  • What numbers when multiplied gives me -6 and when added 5.
    10·1 answer
  • Two coins are tossed at the same time. what is the probability they both land on tails?
    6·2 answers
  • Find the magnitude of −3i<br> .
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!