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
choli [55]
3 years ago
5

What is the sum of -6 4/5 and 6 4/5 ?

Mathematics
2 answers:
daser333 [38]3 years ago
3 0

Answer:

0.

Step-by-step explanation:

-6 4/5 + 6 4/5 equals zero.

neonofarm [45]3 years ago
3 0
0 because 6 4/5 subtracted by itself is 0
You might be interested in
Production of a gas flow meter takes place in two distinct operations. Measurements (n = 15) of the time required for the first
Karolina [17]

Answer:

a) P(a > 80) = 0.323

b) The 95% confidence interval = (73.40, 80.60)

c) The 95% confidence interval expresses that the mean of the distribution can always be found in the given range, with a 95% confidence level.

Step-by-step explanation:

X ~ (45, 4)

Y ~ (32, 2.5)

(X+Y) ~ (77, 6.5)

Let a = (X+Y)

a) Probability that the time required to complete both of those steps will exceed 80 min = P(a > 80)

This is a normal distribution problem

We then standardize 80 min time

The standardized score for any value is the value minus the mean then divided by the standard deviation.

z = (a - μ)/σ = (80 - 77)/6.5 = 0.46

To determine the probability the time required to complete both of those steps will exceed 80 min = P(a > 80) = P(z > 0.46)

We'll use data from the normal probability table for these probabilities

P(a > 80) = P(z > 0.46) = 1 - P(z ≤ 0.46) = 1 - 0.677 = 0.323

b) 95% confidence interval for the expected total time required to produce one flow meter.

We need to obtain the margin of error

Margin of error = (critical value) × (standard error of the sample)

Critical value for a 95% confidence interval = critical value for a significance level of 5% = t(15-1, 0.05/2) = 2.145 (using the t-score since information on the population mean and standard deviation isn't known)

Standard error for the sample of sum of times = (standard deviation of the sum of times)/√n = (6.5/√15) = 1.678

Margin of error = 2.145 × 1.678 = 3.60

Limits of the confidence interval = (Sample mean ± margin of error)

Lower limit of the confidence interval = (Sample mean - margin of error) = 77 - 3.60 = 73.40

Upper limit of the confidence interval = 77 + 3.60 = 80.60

The confidence interval = (73.40, 80.60)

4 0
3 years ago
Metal strips 11 feet long and 2 feet wide . of the stripping costs $6 per foot , find the total costs
adoni [48]
The area of the metal strips:
A = L * W , where L stays for length and W stays for wirth.
A = 11 ft * 2 ft ;
A = 22 ft^2.
If it costs $6 per foot:
Total cost = 22 * 6 = $132.
Answer: The total cost of a metal strip is $132.
5 0
3 years ago
Read 2 more answers
HELLLLLLLLPPPPPPPPPPPP,
Marat540 [252]

Answer:

-1/12

Step-by-step explanation:

12x-3 = -4

12x= -1

x= -1/12

6 0
3 years ago
Can someone plz help me with this plzz
vesna_86 [32]

Answer:

hi how are you wanna be friend

Step-by-step explanation:

6 0
2 years ago
What is the rate of change for the function and what does the rate of change represent? A. $50; the cost to rent the boat for 1
KiRa [710]

I personally think its B but you gotta say if its either multiplication or addition or division

3 0
3 years ago
Read 2 more answers
Other questions:
  • }
    12·1 answer
  • Help me ASAP!!<br> This is timed
    10·1 answer
  • At what x-values do the graphs of the functions y=cos 2x and y = cos^2 x-1 intersect over the interval 0 ≤ x ≤ pi. There must be
    15·2 answers
  • Please help me with this, there’s a picture of the question
    5·2 answers
  • The distribution of the number of transactions performed at a bank each day is approximately normal with mean 478 transactions a
    13·1 answer
  • How do I do this problem<br> 2 - (7/8 - 3/4 =
    5·1 answer
  • Need help on this two column proof for geometry
    9·1 answer
  • Round your answer to the nearest hundredth.<br><br> PLEASE HELP ME
    15·1 answer
  • What is the next term in the sequence below?
    7·2 answers
  • Geometry problem in the picture: find the missing side and round to the nearest tenth
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!