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enyata [817]
3 years ago
15

5x-(2x+2)=x+2(3x-5)

Mathematics
1 answer:
lidiya [134]3 years ago
8 0
The correct answer to this equation is X=2.


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A computer training institute has 625 students that are paying a course fee of $400. Their research shows that for every $20 red
Anastasy [175]
1.
If no changes are made, the school has a revenue of :

625*400$/student=250,000$

2.
Assume that the school decides to reduce n*20$.

This means that there will be an increase of 50n students.

Thus there are 625 + 50n students, each paying 400-20n dollars.

The revenue is: 

(625 + 50n)*(400-20n)=12.5(50+n)*20(20-n)=250(n+50)(20-n)

3.

check the options that we have, 

a fee of $380 means that n=1, thus 

250(n+50)(20-n)=250(1+50)(20-1)=242,250   ($)


a fee of $320 means that n=4, thus

 250(n+50)(20-n)=250(4+50)(20-4)=216,000    ($)


the other options cannot be considered since neither 400-275, nor 400-325 are multiples of 20.

Conclusion, neither of the possible choices should be applied, since they will reduce the revenue.
6 0
3 years ago
7392 rounded to nearest hundred
Pie
7392 rounded to the nearest hundred is 7400
6 0
3 years ago
Read 2 more answers
An electrolyte solution has an average current density of 1 ampere per square decimeter (A/dm^2). What is the current density of
11Alexandr11 [23.1K]
<h2>Answer:</h2>

<u>the density of electrolyte solution is 100 ampere per square meter</u>

<h2>Step-by-step explanation:</h2>

We know that the Average current density of the solution = 1 ampere per square decimeter  and we need to find the average current density of the solution in ampere per square meter. So


4 0
3 years ago
Read 2 more answers
If the diameter of a sphere is doubled, its surface becomes
hodyreva [135]
Volumes scale as the cube of a corresponding dimension. Therefore, if the radius of a sphere is doubled (r becomes 2r), the surface area becomes 2 squared, or 4 times the original surface area. The volume would become 2 cubed, or 8 times the original volume.
8 0
3 years ago
1. The local furniture store pays $140 for a chair and sells it with a
zalisa [80]

Answer:

a. $56

b. $196

Step-by-step explanation:

a. Markup price

= 40% of 140

= 0.40*140

= $56

b. Selling Price

= $140 + $56

= $196

5 0
3 years ago
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