1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tatyana61 [14]
3 years ago
14

Ya idk how to do this plz help explain if you can

Mathematics
1 answer:
Svet_ta [14]3 years ago
5 0

Answer:

  92 attendees had activity cards

Step-by-step explanation:

Let x be the number of students with activity cards. Then 130-x is the number without, and the total revenue is ...

  7x +10(130 -x) = 1024

  7x +1300 -10x = 1024 . . . . eliminate parentheses

  -3x = -276 . . . . . . . . . . . . . collect terms; subtract 1300

  x = 92 . . . . . . divide by 3

92 students with activity cards attended the dance.

_____

<em>Comment on the solution</em>

Often, you will see such a problem solved using two equations. For example, they might be ...

Let 'a' represent the number with an activity card; 'w' the number without. Then ...

  • a+w = 130 . . . . the total number of students
  • 7a +10w = 1024 . . . . the revenue from ticket sales

The problem statement asks for the value of 'a', so you want to eliminate w from these equations. You can do that using substitution. Using the first equation to write an expression for w, you have ...

  w = 130-a

and making the substitution into the second equation gives ...

  7a +10(130 -a) = 1024

This should look a lot like the equation we used above. There, we skipped the extra variable and went straight to the single equation we needed to solve.

You might be interested in
What is greater or less than
PIT_PIT [208]

Answer:

0.87 > 0.17

3.97 < 6.63

8.04 < 8.9

  Is that what ur looking for?

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is the factored form of 25x^2-120x+150
romanna [79]
The answer that you should get is 5(5x^2- 24x +30)
7 0
3 years ago
Read 2 more answers
Which equation can be used to find the area of the blue triangle?
kvv77 [185]
Answer: B) A=1/2(7)(12).

Explanation: The formula for area of a triangle is 1/2bh. Only B maintains this formula.
5 0
2 years ago
Read 2 more answers
Does any one know the answer to this thank you
makvit [3.9K]

Answer:

The First choice

Step-by-step explanation:

8 0
3 years ago
The graph of 2x+y=8 is shown on the graph below. Graph the equation y=13x−6 on the same coordinate plane below. Plot the point t
Viktor [21]
Im not sure why it brought me here it just brought me here sorry
7 0
3 years ago
Other questions:
  • What is 0.5, 3/16, 0.75, and 5/45 from least to greatest
    5·1 answer
  • Can anyone help??? I’m stuck
    9·2 answers
  • Which of the following numbers can be expressed as repeating decimals?
    12·1 answer
  • 3) Is the following a function?<br> (-4, 10) (10,-6) (8, 10) (2,-9) (0,7)
    5·2 answers
  • Someone please help! (listing BRAINLIST and giving points) ​:D​
    12·2 answers
  • Free pts amd brainliest
    8·2 answers
  • Solve for the missing side
    9·1 answer
  • Helpppppp what is the x!!!!!
    13·1 answer
  • Which list below shows the fractions in order from greatest to least?
    12·1 answer
  • Will give brainliest NEED HELP can some explain how to do this THANKS :D
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!