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
a_sh-v [17]
2 years ago
12

The 9th graders are selling tickets to raise

Mathematics
1 answer:
Sidana [21]2 years ago
3 0

Answer:

There were 30 children and 10 adults.

Step-by-step explanation:

Since they sold tickets to adults and childrens, the sum of those tickets must be equal to the total tickets that were sold, so we can mount our first equation as shown below:

adult + children = 40

Each adult ticket costs $9 and each children costs $5 and the total recieved was $240, therefore:

9*adult + 5*children = 240

We can mount the following equation system:

adult + children = 40

9*adult + 5*children = 240

We will multiply the first equation by -5 and sum both equations:

-5*adult -5*children = -200

9*adult + 5*children = 240

4*adult = 40

adult = 40 / 4

adult = 10

adult + children = 40

children = 40 - adult = 40 - 10 = 30

There were 30 children and 10 adults.

You might be interested in
Is |-6| a negative integer
stiv31 [10]

Answer:

NO. |-6| = 6 - a positive integer

Step-by-step explanation:

|a| = a for a ≥ 0

examples

|2| = 2, |0| = 0, |0.56| = 0.56

|a| = -a for a < 0

examples

|-2| = -(-2) = 2, |-100| = -(-100) = 100, |-0.25| = 0.25

Therefore your answer:

|-6| = 6 > 0

3 0
3 years ago
Graph the system of linear equations. negative StartFraction one-half EndFraction y equals StartFraction one-half EndFraction x
inna [77]

The solution to the given system is (3,8).

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

To draw a graph system for a linear equation,

Step 1: Consider two x values and draw a line joining the new points.

y = x + 5  ⇒1

y = 2x + 2  ⇒2

For both equations substitute two random values for x.

Let us Consider x=0 and x=10.

For equation 1,

y=x+5.                           y=x+5

y=0+5.                           y=10+5

y=5                                y=15

The new points for equation 1 are (0,5) and (10,15).

Draw a big straight line passing through these two points.

For equation 2,

y=2x+2.                         y=2x+2

y=0+2.                           y=20+2

y=2                                y=22.

The new points for equation 1 are (0,2) and (10,22).

Again, draw a big straight line passing through these two points.

Step 2: Mark the intercepting point and that will be the solution for the given system.

For this system, the solution is (3,8).

To check this answer equate both equations,

x+5=2x+2.

2x-x=5-2.

x=3.

Substitute x value in any of the equation,

y=3+5.

y=8.

So the resulted point is (3,8).

6 0
3 years ago
Read 2 more answers
Pls answer this right now i need it so much i'll give you brainleist and follow you thank you so much.
BlackZzzverrR [31]
The answer to this could be A in my opinion because an algebraic equation does not always have an equal sign but the variable is usually a letter
4 0
2 years ago
Read 2 more answers
Given f(x) = 70 + 11x, find x when f(x) =158
Mumz [18]

Answer:

\huge  \boxed{x = 8}

Step-by-step explanation:

f(x) = 70 + 11x

To find the value of x when f(x) =158 , equate f(x) to 158

We have

70 + 11x = 158 \\ 11x = 158 - 70 \\ 11x = 88

Divide both sides by 11

\frac{11x}{11}  =  \frac{88}{11}  \\

We have the final answer as

<h3>x = 8</h3>

Hope this helps you

5 0
3 years ago
How to convert 0.6666666667 to a fraction
Arada [10]
If you got this answer from a calculator, it rounds the last decimal point because there is not enough room on it to show that it is a repeating decimal.

Really, the decimal is .666666666666...... , or 2/3

This is one of the most common repeating decimals that will come up in later math practices. It would be a helpful conversion to memorize.

Hope this helped!! :)
4 0
2 years ago
Other questions:
  • How do i write a proof for this
    15·1 answer
  • Evaluate 5|x³ - 2| + 7 when x = -2.
    10·2 answers
  • the price of a small pizza increased from $5 to $8. what is the percent of increase in the cost of the pizza? round to the neare
    9·1 answer
  • The dimensions of a CD case are 14.2cm by 12.5cm. Each case is approxiomately 1cm deep. What would be the volume of this stack o
    6·1 answer
  • A gas station fills up at a rate of 7/8 per 9/10 of. aminute. what is the rate for one minute
    13·1 answer
  • If sina-Cosa= o find coseca.<br><br><br>​
    14·1 answer
  • Which algebraic expression is a polynomial?
    14·1 answer
  • Helpp
    12·1 answer
  • Find the equation of the line.
    9·1 answer
  • 4<br> 5<br><br> x − 6 = 2<br><br><br><br> i need help
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!