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Dmitry [639]
3 years ago
13

B(n)=−4−2(n−1)b, left parenthesis, n, right parenthesis, equals, minus, 4, minus, 2, left parenthesis, n, minus, 1, right parent

hesis
Find the 12^\text{th}12


th


12, start superscript, start text, t, h, end text, end superscript term in the sequence.
Mathematics
1 answer:
Inessa05 [86]3 years ago
8 0

Answer:

12th term would be -26.

Step-by-step explanation:

Given explicit formula of a sequence,

b(n) = -4 - 2(n-1)

Where,

n = number of a term.

i.e. 12th term will get after putting n = 12 in the formula.

Hence, 12th term of the sequence would be,

b(12) = -4 - 2(12-1)

=-4-2(11)

= -4 - 22

= -26

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kvv77 [185]
6x+4 (H)
.........................
4 0
2 years ago
Suppose that administrators of a large school district wish to estimate the proportion of children in the district enrolling in
11Alexandr11 [23.1K]

Answer:

95% z-confidence interval for the proportion of all children enrolled in kindergarten who attended preschool is between a lower limit of 0.528 and an upper limit of 0.772.

Step-by-step explanation:

Confidence interval = p + or - zsqrt[p(1-p) ÷ n]

p is sample proportion = 39/60 = 0.65

n is the number of children sampled = 60

Confidence level (C) = 95% = 0.95

Significance level = 1 - C = 1 - 0.95 = 0.05

Divide significance level by 2 to obtain critical value (z)

0.05/2 = 0.025 = 2.5%

z at 2.5% significance level = 1.96

zsqrt[p(1-p) ÷ n] = 1.96sqrt[0.65(1-0.65) ÷ 60] = 1.96sqrt[0.2275 ÷ 60] = 1.96sqrt(3.792×10^-3) = 1.96×0.062 = 0.122

Lower limit = p - 0.122 = 0.65 - 0.122 = 0.528

Upper limit = p + 0.122 = 0.65 + 0.122 = 0.772

95% confidence interval is between 0.528 and 0.772

5 0
2 years ago
PLSSSSSS HELPPPPP WITHH THISSS MATH oh and pls explain it so i can understand it :)
Vadim26 [7]

Answer:

The answer is -2.

Step-by-step explanation:

The answer is -2 because the question is asking what -1/3 minus 1 2/3. Let's put this as an improper fraction. You will have -1/3 minus 5/3. When you subtract it, you get -6/3 which is the same as -2. I hope this helps!

7 0
2 years ago
Suppose two trains leave a certain​ station, at the same​ time, traveling in opposite directions. one train travels 1010 mph fas
Rom4ik [11]

In the question, it is given that

Suppose two trains leave a certain​ station, at the same​ time, traveling in opposite directions. one train travels 10 mph faster than the other. in 2.5hours, the trains are 255 miles apart.

Let the speed of the slower train be x m/h and faster train be (x+10) m /h.

Distances travelled by them are

d_{slower} = 2.5 x \ miles, d_{faster} = 2.5(x+10) miles

And total distance is 255 miles, that is

2.5x +2.5(x+10) = 255
\\
x+x+10=102
\\
2x = 92
\\
x = 46 MPH

So the speed of slower train is 46 MPH and of faster train is 56MPH.

8 0
2 years ago
How many solutions can be found for the equation 3y + 5 − 2y = 11?
Zina [86]
We can solve the equation to find it's number of solutions, but we already know it only has 1 solution because it is a linear equation (y is raised to the first power).

3y + <span>5 − 2y = 11
</span>y + <span>5 = 11
</span>y = 6

This confirms that there is only 1 solution.
7 0
3 years ago
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