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Alja [10]
3 years ago
13

3/5 (10x + 15) = +30 help me please

Mathematics
1 answer:
sergeinik [125]3 years ago
7 0

Answer:

x = 3.5

Step-by-step explanation:

\frac{3}{5} (10x + 15) = 30

10x + 15  = 30 * \frac{5}{3}  

10x + 15   = 10 * 5

10x + 15   = 50           {Subtract 15 form both sides}

         10x = 50 -15

        10x = 35         {Divide both sides bt 10}

    10x/10 = 35/10  

          x = 3.5

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Kipish [7]

Answer:    70

plz give brainliest

Step-by-step explanation:

Solution:

Since

96 : 160 = 42 : X

Then we know

160/96 = X/42

Multiplying both sides by 42 cancels on the right

42 × (160/96) = (X/42) × 42

42 × (160/96) = X

Then solving for X

X = 42 × (160/96)

X = 70

Therefore

96 : 160 = 42 : 70

5 0
3 years ago
Read 2 more answers
Suppose the time it takes for a purchasing agent to complete an online ordering process is normally distributed with a mean of 8
Luba_88 [7]

Answer:  0.4

Step-by-step explanation:

We know that the standard deviation of the sampling distribution of mean​ is given by:-

\sigma_x=\dfrac{\sigma}{\sqrt{n}}

Given : Standard deviation : \sigma= 2\text{ minutes}

Sample size : n= 25

Then, the standard deviation of the sampling distribution of mean​ times will be :-

\sigma_x=\dfrac{2}{\sqrt{25}}\\\\\Rightarrow\ \sigma_x=\dfrac{2}{5}=0.4

Hence, the standard deviation of the sampling distribution of mean​ times=0.4

7 0
3 years ago
Patrick walked 3/5 miles on the first day, 5/7 miles on the second day, third day he walked half of the first day’s distance and
Alisiya [41]

After the total distance on the first, second and third days, Patrick had walked 3.45miles

5 0
3 years ago
Find the percentage error if you: Estimate your credit card balance to be $2000 when it is $2590. a. 22.8% b. 20.5% c. 30.8% d.
OverLord2011 [107]

Answer:

a) 22.8%

Step-by-step explanation:

(2590-2000) ÷ 2590 =

590 ÷ 2590 =

.2277 = 22.8%

4 0
3 years ago
The test scores of 1,200 students are normally distributed with a mean of 83 and a standard deviation of 5.5. Under which interv
KATRIN_1 [288]

Using the Empirical Rule, it is found that the interval in which approximately 978 students scored was:

A. 72 < x < 88.5.

<h3>What does the Empirical Rule state?</h3>

It states that, for a normally distributed random variable:

  • Approximately 68% of the measures are within 1 standard deviation of the mean.
  • Approximately 95% of the measures are within 2 standard deviations of  the mean.
  • Approximately 99.7% of the measures are within 3 standard deviations of the mean.

The percentage that 978 is of 1200 is:

978/1200 x 100% = 81.5%.

Considering the symmetry of the normal distribution, two outcomes are possible involving 81.5% of the measures:

  • Between one standard deviation below the mean and two above, which in the context of this problem is between 77.5 and 94.
  • Between two standard deviations below the mean and one above, which in the context of this problem is between 72 and 88.5, which is option A in this problem.

More can be learned about the Empirical Rule at brainly.com/question/24537145

#SPJ1

4 0
2 years ago
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