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frutty [35]
3 years ago
9

Five times the difference of twice a number and twelve is negative twenty. Find the number. I need help with this guys please so

meone help
Mathematics
1 answer:
Lilit [14]3 years ago
7 0

Answer:

The number is 4.

Step-by-step explanation:

The difference of twice a number and 12 is 2x - 12.

Multiplying by 5 gives 5(2x - 12)

So 5(2x - 12) = -20

Solving for x

10x - 60 = -20

10x  = -20 + 60 = 40

x = 40/10

x = 4.

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Plz gyz ineed the calculation
sergejj [24]

Answer:

Step-by-step explanation:

so he spends : 1/5 , 1/2 , 1/10.....common denominator of 10

1/5 + 1/2 + 1/10 = 2/10 + 5/10 + 1/10 = 8/10 = 4/5

so he spends 4/5 of his income.

that means he saves : 1 - 4/5 = 5/5 - 4/5 = 1/5 <==

8 0
2 years ago
Find the sum of the first five terms using the geometric series formula for the sequence 1/2, -1,2,-4…
sammy [17]

The sum of the first five terms is 11/2

<h3>How to determine the sum?</h3>

The series is given as:

1/2, -1,2,-4…

Calculate the common ratio of the series using

r = -4/2

Evaluate

r = -2

The sum is then calculated as:

S_n = a\frac{1 - r^n}{1 - r}

This gives

S_n = \frac{1}{2} * \frac{(1 - (-2)^5}{1 + 2}

Evaluate

S_n = \frac{1}{2} * \frac{33)}{3}

Evaluate

S_n =\frac{11}{2}

Hence, the sum of the first five terms is 11/2

Read more about series at:

brainly.com/question/11346378

#SPJ1

7 0
1 year ago
Find out what number the X represents <br>7x -9 = 5<br>​
BigorU [14]

I have worked it out the answer equals 2

8 0
2 years ago
"During their first swim through a water maze, 15 laboratory rats made the following number of errors (went the wrong way): 2, 1
velikii [3]

Answer:

mean = 7.8, median =5, and mode(s) =5

the shape of the distribution is positive skewed

Step-by-step explanation:

Find the mean, median and mode(s) for

2, 17, 5, 3, 28, 7, 5, 8, 5, 6, 2, 12, 10, 4, 3

the mean = sum of (2, 17, 5, 3, 28, 7, 5, 8, 5, 6, 2, 12, 10, 4, 3)/15 =

              =  7.8          

the median = 2, 2, 3, 3, 4, 5, 5, 5,  6, 7,  8, 10, 12, 17, 28, = the middle value, the 8th value falls in the middle = 5

the mode is the most occurring value = 5

2. Without constructing a frequency distribution or graph, would you characterize the shape of this distribution as balanced, positively skewed, or negatively skewed?

positive skewed or Right skewed because the value of the mean is greater than the median

A right skewed histogram is a positive skewed histogram (which means the tail is longer the positive direction) that have its tail to the right.For a right skewed histogram the mean has a larger value that the median because the peak of the skewness fall in the median range then the mean follow to the right. and the data drive the mean value to the right which increase in value.

Read more on Brainly.com - brainly.com/question/14703862#readmore

5 0
3 years ago
Enid, Eddie, and Tamara have formed a partnership. The total investment was $250,000. Enid
JulsSmile [24]

Answer:

114,250

Step-by-step explanation:

Enid invested 43,750

Eddie invested 92,000

the difference is 114,250

8 0
3 years ago
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