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dusya [7]
3 years ago
7

Plz help will be marked BRAINLIEST!! Yed

Mathematics
2 answers:
Natasha2012 [34]3 years ago
8 0

X=−13

Distribute

Subtract

simplify

divide both sides

then simplify again to arrive at your answer.

AVprozaik [17]3 years ago
6 0
Given 3(x+7)=-12, we could do 2 things: we could distribute or divide both sides by 3. It appears that we will divide both sides by 3.

3(x+7)/3=-12/3 Divide 3 on both sides to isolate X by Division P.O.E.

x+7=-4.

Then, x+7-7=-4-7 by Subtraction P.O.E. to isolate X.

X=-11 is your answer
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ivolga24 [154]
6 and 2/3 is larger......................

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3 years ago
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Isabella is playing a board game. The probability that Isabella will lose a turn on her next turn is 11%. Which word or phrase d
anzhelika [568]

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unlikely

Step-by-step explanation:

11% is closer to 0 than it is to 1/2. when something may occur, but significantly less than half of the time, we say it is unlikely

6 0
3 years ago
Pls help me with this one​
Over [174]

Answer:

8/7 x 9/10 is 72/70

7/10 x 9/8 is 63/80

10/7 x 9/8 is 90/56

7/9 x 8/10 is 56/90

4 0
3 years ago
A survey of 865 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 95% confid
katrin [286]

Answer:

The 95% confidence interval for the true proportion of all voters in the state who favor approval is (0.4384, 0.5050).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 865, \pi = \frac{408}{865} = 0.4717

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4717 - 1.96\sqrt{\frac{0.4717*0.5283}{865}} = 0.4384

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4717 + 1.96\sqrt{\frac{0.4717*0.5283}{865}} = 0.5050

The 95% confidence interval for the true proportion of all voters in the state who favor approval is (0.4384, 0.5050).

6 0
3 years ago
Process control is nothing more or less than monitoring quality as the work is being performed. Perhaps the most widely adopted
ella [17]

Answer:

a. Grand Mean = 2.799

b. Standard Deviation = 0.01387

c. Standard Error = 0.0016

d. The range with a Z score of 3 = (2.75739, 2.84061)

Step-by-step explanation:

a. Grand mean :

Given that

Sum of 80 values = 223.91

Total observation = 80

Grand mean = 223.91/80 = 2.799

b. With the excel command "STDEV[range of cells]", we get the standard deviation as = 0.01387

c. Standard error =  Standard deviation / root of n

= 0.01387/\sqrt{80}\\ = 0.0016

d. The range with a Z score of 3 :

lower limit = mean - (3 * SD) = 2.799 - (0.04161) = 2.75739

upper limit = mean + (3 * SD) = 2.799 + (0.04161) = 2.84061

8 0
3 years ago
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