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3 years ago

Help me I sorta get it but still help

Mathematics

2 answers:

Luda [366]3 years ago

8 0

I am pretty sure it’s just a and b. i hope this helps.
explanation:
-1/2(4-2+6x)
-2+1-3x
-1-3x
so basically if you just simplify the equation you’ll get the answers.

lara31 [8.8K]3 years ago

5 0

Answer:

ok so u jus gotta pick all that apply or is equal to -1/2(4 - 2 + 6x). i hope this helpsssssssssss

Step-by-step explanation:

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Evaluate the expression 7x + y when x = 2 and y 6

sammy [17]

7(2) + 6
14 + 6
20
This is a answer = 20

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3 years ago

Read 2 more answers

Which of the following reasons is used to prove A E || D K in the proof below given D A/A F = K E/ E F?

ohaa [14]

Answer:

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6 0

3 years ago

If conditional is true and it’s_____ is true, then the conclusion is true

Jlenok [28]

Answer:

hypothesis

Step-by-step explanation:

The statement "if p, then q" is a conditional statement.

p----->is the hypothesis

q----->is the conclusion

This conditional is true if it's hypothesis true and the conclusion is true.

This is just one out three situations for which the conditional is true.

6 0

3 years ago

The ages (in years) and weights (in pounds) of all wide receivers for a football team are listed. Find the coefficient of variat

IceJOKER [234]

Answer:

The coefficient of variation for the weight and age are 5.9% and 10.6%.

Step-by-step explanation:

The coefficient of variation (CV) is well defined as the ratio of the standard deviation to the mean. It exhibits the degree of variation in association to the mean of the population.

The formula to compute the coefficient of variation is:

$CV=\frac{\sigma}{\mu}\times 100\%$

Here σ = standard deviation and µ = mean.

Compute the mean and standard deviations of the two data set in Excel using the following functions.

Mean=AVERAGE()

Standard deviation=STDEV.S()

Consider the Excel sheet attached.

The mean and standard deviation of weight are:

Mean = 202, Standard deviation = 11.87

And the mean and standard deviation of weight are:

Mean = 25.88, Standard deviation = 2.75

Compute the coefficient of variation for the weight as follows:

$CV_{weight}=\frac{\sigma}{\mu}\times 100\%$

$=\frac{11.87}{202}\times 100\%\\\\=5.87624\\\\=5.9\%$

Compute the coefficient of variation for the age as follows:

$CV_{age}=\frac{\sigma}{\mu}\times 100\%$

$=\frac{2.75}{25.88}\times 100\%\\\\=10.62597\\\\=10.6\%$

Thus, the coefficient of variation for the weight and age are 5.9% and 10.6%.

8 0

3 years ago

Shawn and Ellie are construction workers. Shawn can complete a concrete job in 5 hours, while Ellie can complete it in 7 hours.

eimsori [14]

Step-by-step explanation:

We generally assume that when multiple resources are put on a job, the completion rate is the sum of the completion rates of the different resources. Rate is generally measured in units per time. Here, the appropriate "unit" is "job".

Step 1 is convert the hours per job to a rate in terms of jobs per hour.

... Shawn can complete 1/5 job per hour.

... Ellie can complete 1/7 job per hour.

Step 2 is to add the rates to get the total rate when both resources are applied.

... (1/5 job/h) + (1/7 job/h) = (7/35 +5/35) job/h = 12/35 job/h

Step 3 is to convert that rate back to the time require to complete one job. We can divide the work to be done (1 job) by the rate at which it is done in order to find the time required.

... (1 job)/(12/35 job/h) = 35/12 h = 2 11/12 hours = 2 hours 55 minutes

The foreman is incorrect.

_____

<em>Comment on the solution</em>

The time when workers work together will always be between the longest time divided by the number of workers (7/2 = 3.5 hours here) and the shortest time divided by the number of workers (5/2 = 2.5 hours here). Our answer of 2.92 hours is in that range.

The foreman should know better. (If s/he were to divide the average completion time (6 h) by the number of workers (2), s/he would have a guess of 3 hours—closer, but still incorrect.)

4 0

4 years ago