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ExtremeBDS [4]
3 years ago
7

Is it more efficient to solve -3x+y=1 for x?why or why notes

Mathematics
1 answer:
lara31 [8.8K]3 years ago
7 0

Answer:

x = y/3 - 1/3

Step-by-step explanation:

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Construct a 95​% confidence interval to estimate the population mean using the data below. x overbarequals37 sigmaequals10 nequa
kap26 [50]

Answer:

With 95% confidence when n equals 44, the population mean is between a lower limit of 33.96 and an upper limit of 40.04

Step-by-step explanation:

Confidence Interval = mean + or - Error margin (E)

mean = 37

sd = 10

n = 44

degree of freedom = n - 1 = 44 - 1 = 43

t-value corresponding to 43 degrees of freedom and 95% confidence level is 2.0165

E = t × sd/√n = 2.0165×10/√44 = 3.04

Lower limit = mean - E = 37 - 3.04 = 33.96

Upper limit = mean + E = 37 + 3.04 = 40.04

95% confidence interval is between 33.96 and 40.04

7 0
3 years ago
Given that m∠ABD = 84° and m∠BAC = 37°, what is the m∠ACD?
stich3 [128]

Answer: 84°

Step-by-step explanation:

Pardon my drawing, I know it;s not prefect, and I'm not sure how to draw a figure on Brainly, but this is the best I can do. For this problem, it is easier to draw it out so you can see that the angles look like. Just pretend the lines are filled in, and this is a perfect parallelogram.

       

      A   ________________ C

        /                                   /

      /                                  /

    /                                 /

B /_______________/ D

As you can see, the angles given in the problem gives us a parallelogram. Since we know m∠ABD is 84° and m∠BAC is 37°, we know that m∠ACD is 84°. If you draw diagonal lines, ∠ABD and ∠ACD are vertical angles. Vertical angles are congruent. Therefore, m∠ACD is 84°.

7 0
3 years ago
Which The following is a residual plot from a regression of a variable with the independent variable x.
katen-ka-za [31]

Answer:

Yes, because the plot shows no apparent pattern.

Step-by-step explanation:

7 0
3 years ago
A guitar string has a number of frequencies at which it will naturally vibrate when it is plucked. These natural frequencies are
AlladinOne [14]

Answer:

Step-by-step explanation:

4 0
2 years ago
5^2= (-5)^2 <br> true or false
Nonamiya [84]
It’s True because of 5 square is equal to 25
Than (-5) square is also get the same value as 5^2
8 0
3 years ago
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