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shutvik [7]
3 years ago
6

A factory produced 150 tons of steel in one year. The next year, the output increased to 180 tons. What is the percentage increa

se in the output?
Mathematics
1 answer:
nirvana33 [79]3 years ago
4 0
The amount of increase is  (180 - 150)  =  30 tons.

The increase as a part of the original amount is  30/150  =  0.2

To change a decimal into a percent,
move the decimal point 2 places that way  ===> .

                     0.2  =  20%
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A group of students calculated their average score at a spelling bee. They realized that if one of them scored 9 more points, th
alukav5142 [94]

Answer: There are 4 students in the group.

Step-by-step explanation:

Let the number of students in the group be n

If one of them scored 9 more points , their average score would be 81 points.

So, our equation (1) will be

\frac{\sum x+9}{n}=81\\\\\sum x+9=81n

Similarly,

If one of them scored 3 points less, their average score would be 78 points.

So, our equation (2) will be

\frac{\sum x-3}{n}=78\\\\\sum x-3=78n

So, from equation (1) and (2) we get:

81n-9=\sum x=78n+3\\\\81n-9=78n+3\\\\81n-78n=3+9\\\\3n=12\\\\n=\frac{12}{3}\\\\n=4

Hence, there are 4 students in the group.

8 0
3 years ago
3x+-6+2 > = 5x -8......can someone please solve this
Maksim231197 [3]

Answer:

x ≤ 2

Step-by-step explanation:

If you referencing ">=" as greater than or equal to, follow the solution below:

Solve:

3x - 6 + 2 ≥ 5x - 8

Combine like terms.

3x - 4 ≥ 5x - 8

Subtract 5x from both sides.

-2x - 4 ≥ -8

Add 4 to both sides.

-2x ≥ -4

Divide both sides by -2, while flipping the inequality as well since you're dividing by a negative number.

x ≤ 2

Your answer would be x ≤ 2

6 0
3 years ago
Kenya has 2 hours to work a 100 problem math test. At what rate must she work in order to finish in 2 hours?
slavikrds [6]

What does this quote tell us about the media’s influence during the Nixon investigation?
 
"We saw the public man in his first administration, and we were impressed. Now in about 300,000 words we have seen the private man, and we are appalled." – Clayton Kirkpatrick, editor of the Chicago Tribune, a newspaper that published the entire transcript of Nixon’s released communications

  A. The media shared real evidence and their opinions on it, which probably influenced citizen opinion.  B. The media disapproved of the president’s private actions but still supported and re-elected him. C.The media rallied behind the president because of his great record during his first term in office.<span> D. The media could not publish or discuss real evidence related to the president or the investigation. please help me.</span>

<span>the answer for u is  </span>

<span>2 hours=120 minutes
You simply just do 120/100=1.2
So the answer is B. 1.23 or 1.2 (rounded) per minute</span>


4 0
3 years ago
Read 2 more answers
A new superhero movie has its first showing and there are 155 people in line to see it. If the ratio of kids to adults waiting t
lidiya [134]

The number of adults waiting to see the new superhero movie is 62.

<h3>How many adults are waiting in line?</h3>

Ratio expresses the relationship between two or more numbers. Ratio is used to compare two or more numbers. It shows the number of times that one value is contained in another value.

Looking at the ratio given in this question, we know that there are 1 1/2 (3 /2) more children than adults on the line to watch the new superhero movie.

Number of adults waiting to see the movie = (ratio that represents adults / sum of ratio) x total number of people wafting in line

Sum of ratios = 2 + 3 = 5

(2/5) x 155 = 62 people

To learn more about ratios, please check: brainly.com/question/25927869

#SPJ1

3 0
1 year ago
Many professional schools require applicants to take a standardized test.
Mars2501 [29]

Answer:

if pete placed in the 73rd percentile, this means that his score was better than 73% of the other test takers, so the fourth option: he scored more than about 73% of the test takers

Step-by-step explanation:

hope this helps :)

5 0
3 years ago
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