Answer:
the first one
the third one
the fourth one
Step-by-step explanation:
1. x <em>does</em> equal 9
2. the equation would lead to x being canceled out so there would be an x in your answer
3. x <em>does</em> equal 30
4. x <em>does</em> equal 6
5. x should equal 135
Question is Incomplete;Complete question is given below.
Mustafa’s soccer team is planning a school dance as a fundraiser. The DJ charges $200 and decorations cost $100. The team decides to charge each student $5.00 to attend the dance. If n represents the number of students attending the dance, which equation can be used to find the number of students needed to make $1,500 in profit?
![5n - 300 = 1,500\\\\5n + 300 = 1,500\\ \\5n - 200 + 100n = 1,500\\\\5n - 100 -200n = 1,500](https://tex.z-dn.net/?f=5n%20-%20300%20%3D%201%2C500%5C%5C%5C%5C5n%20%2B%20300%20%3D%201%2C500%5C%5C%20%5C%5C5n%20-%20200%20%2B%20100n%20%3D%201%2C500%5C%5C%5C%5C5n%20-%20100%20-200n%20%3D%201%2C500)
Answer:
![5n - 300 = 1,500](https://tex.z-dn.net/?f=5n%20-%20300%20%3D%201%2C500)
Step-by-step explanation:
Given:
Charges of DJ = $200
Decoration charges = $100
Profit need to be made = $1500
Charges per student to attend the dance = $5
We need to write the equation to find the number of students for to attend the dance in order to make profit.
Solution:
Let the number of student be represented by 'n'.
Now we can say that;
Profit to be made should be equal to Charges per student to attend the dance multiplied by number of students minus sum of Charges of DJ and Decoration charges.
framing in equation form we get;
![5n-(200+100)=1500\\\\5n-300=1500](https://tex.z-dn.net/?f=5n-%28200%2B100%29%3D1500%5C%5C%5C%5C5n-300%3D1500)
Hence the equation to find the number of students attending the dance is ![5n - 300 = 1,500](https://tex.z-dn.net/?f=5n%20-%20300%20%3D%201%2C500)
Answer:
f(g(x)) = x² - 2x + 1
Step-by-step explanation:
To find f(g(x)), substitute x = g(x) into f(x) , that is
f(g(x))
= f(x - 1)
= (x - 1)² ← expand using FOIL
= x² - 2x + 1
Answer: 15%
Step-by-step explanation:
The Percentage decrease will be:
= Decrease in weight / Old weight × 100
= (200 - 170) / 200 × 100
= 30/200 × 100
= 15%
The Percentage decrease is 15%
Answer:
20% of the money was saved from January.
Here is the way to find percentage.
First: work out the difference (increase) between the two numbers you are comparing.
Increase = New Number - Original Number
Then: divide the increase by the original number and multiply the answer by 100.
% increase = Increase ÷ Original Number × 100.
<u>Step-by-step explanation:</u>