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3 years ago

Five times the sum of a number and 7 equals 3

2 answers:

7 0

Hi there! :)
Let the number be x. Thus, the sum of a number and 7 would be x + 7. We can now set up the equation as follows:
5(x + 7) = 3;
5x + 35 = 3;
x = -32/5
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Hope this helps!
==jding713==

miv72 [106K]3 years ago

5 0

The answer or number that you are looking for is -6.4. You can get this by dividing 3 by 5 which is equal to 0.6. Next you would subtract 7 to reverse the act of having added it. This will give you -6.4 which is what you are looking for.

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If 4(x-2/3)=-18, what is the value of 2x?

elena-14-01-66 [18.8K]

4(x-2/3) = -18
4x - 8/3 = -18
4x = -54/3 + 8/3
4x = -46/3
x = -46/3 * 1/4
x = -46/12
x = -23/2

2x = -23/2 * 2
2x = -46/2
2x = -23

7 0

3 years ago

Complete each calculation using the distributive property.

Alisiya [41]

What are the answer options?

7 0

3 years ago

How do I use the arc length to find the circumference ?

Mashutka [201]

arc length = circumference • [central angle (degrees) ÷ 360]

Solving this equation for circumference:

circumference = arc length / (central angle / 360)

circumference = 12 / (85/360)

circumference = 12 / 0.2361111111 

circumference = 50.8235294118 

Source:
http://www.1728.org/radians.htm

8 0

3 years ago

A store buys a jacket for 20.00$ and then sells it to customers for 80% more than that. What is the selling price of the jacket?

ra1l [238]

Answer:

100 + 80 = 180

20/100 X 180 = 36

selling price $36

5 0

3 years ago

Monitors manufactured by TSI Electronics have life spans that have a normal distribution with a variance of 4,000,000 and a mean

In-s [12.5K]

Using the normal distribution, it is found that there is a 0.2776 = 27.76% probability that the life span of the monitor will be more than 20,179 hours.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean $\mu$ and standard deviation $\sigma$ is given by:

$Z = \frac{X - \mu}{\sigma}$

The z-score measures how many standard deviations the measure is above or below the mean.

Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

The mean and the standard deviation are given, respectively, by:

$\mu = 19000, \sigma = \sqrt{4000000} = 2000$

The probability that the life span of the monitor will be more than 20,179 hours is one subtracted by the p-value of Z when X = 20179, hence:

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{20179 - 19000}{2000}$

Z = 0.59.

Z = 0.59 has a p-value of 0.7224.

1 - 0.7224 = 0.2776.

0.2776 = 27.76% probability that the life span of the monitor will be more than 20,179 hours.

More can be learned about the normal distribution at brainly.com/question/24663213

#SPJ1

6 0

2 years ago