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weeeeeb [17]
3 years ago
11

Find sum of -3,2,7,12....,132 Arithmetic series

Mathematics
1 answer:
jonny [76]3 years ago
8 0
a_1=-3 \\
d=2-(-3)=5 \\
a_n=132 \\ \\
a_n=a_1+d(n-1) \\
132=-3+5(n-1) \\
132=-3+5n-5 \\
132=-8+5n \\
140=5n \\
n=28 \\ \\
S_n=\frac{n(a_1+a_n)}{2} \\
S_{28}=\frac{28(-3+132)}{2}=\frac{28 \times129}{2}=14 \times 129=1806

The sum is 1806.
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Can someone please help me out?
Elza [17]

Answer:

Distribute, subtract, additon,divide

Step-by-step explanation:

4(x-7)=2x-6 to get the second problem you distribute the 4 to the 7 and x

4x-28=2x-6 subtract the 2x from 4x

2x-28=-6   then u add the 28 to the negative 6

2x=22 divide

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4 0
3 years ago
Read 2 more answers
Alex flips a fair coin four times. What is the probability that he flips heads four times in a row?
sdas [7]

1/16

the probability of flipping head on the first flip is 1/2

the probability of flipping head on the second flip is 1/2 of that, or 1/4

the probability of flipping head on the third flip is 1/2 of that, or 1/8

the probability of flipping head on the fourth flip is 1/2 of that, or 1/16

4 0
2 years ago
Given the following statements, which answer uses deductive reasoning to draw the conclusion?
MatroZZZ [7]
Determine whether the stated conclusion is valid based on the given information. If not, write invalid. Explain your reasoning.
3. Given: If a number is divisible by 4, then the number is divisible by 2. 12 is divisible by four.
Conclusion: 12 is divisible by 2.
SOLUTION:
If p → q is a true statement and p is true, then q. Here, a number divisible 4 is divisible by 2 also and 12 is divisible by 4. So, 12 is divisible by 2 is a valid statement by the Law of Detachment.
ANSWER:
valid; Law of Detachment
4. Given: If Elan stays up late, he will be tired the next day. Elan is tired.
Conclusion: Elan stayed up late.
SOLUTION:
If p is true, then q is true, but q being true does not necessarily mean that p is true. Elan could be tired because he worked out. So, the statement is invalid.
ANSWER:
Invalid; Elan could be tired because he worked out.
eSolutions Manual - Powered by Cognero
8 0
3 years ago
Use the given information to draw a box-and-whisker plot of the data set
drek231 [11]

Answer:

The box-and-whisker plot of this distribution is presented in the attached image to this solution.

Step-by-step explanation:

A box plot gives a visual representation of the distribution of the data, showing where most values lie and those values that greatly differ from the rest, called outliers.

A box and whiskers plot shows 5 major information about the distribution of data. It shows:

- The maximum variable.

- The minimum variable.

- The Median.

- The first quartile.

- The third quartile.

Further info such as the range and Inter quartile range can then be obtained from this 5-number summary.

The elements of the box plot are described thus;

The bottom side of the box represents the first quartile, and the top side, the third quartile. Therefore, the width of the central box represents the inter-quartile range.

The horizontal line inside the box is the median.

The lines extending from the box reach out to the minimum and the maximum values in the data set, as long as these values are not outliers. The ends of the whiskers are marked by two shorter horizontal lines.

Variables in the dataset, higher than Q3+(1.5×IQR) or lower than Q1-(1.5×IQR) are considered outliers and are usually shown using dots above the top whisker or below the bottom whisker.

The required boxplot for this question is given in the attached image to this solution.

The median for the boxplot isn't provided, but it was assumed to be midway between the first and third quartile.

Hope this Helps!!!

7 0
3 years ago
Y = -x+5y=−x+5y, equals, minus, x, plus, 5
Serga [27]
The answer is D
Hope this hel
6 0
3 years ago
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