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
mixer [17]
2 years ago
12

A family purchased tickets for a concert. They paid a total of $90 for 7 adult tickets and 12 child tickets. The price of a chil

d ticket was two-thirds the price of an an adult ticket. How much was the price of an adult ticket?
Mathematics
1 answer:
andre [41]2 years ago
4 0
A is aldult tickets
b is child tickets

b = 2/3 a

7a + 12b = 90
7a + 12 x 2/3 a = 90
7a + 8a = 90
15a = 90
a = 6; b = 4
You might be interested in
When constructing an inscribed square how many lines will be drawn
Oksanka [162]
From the research I just did, it seems that 6 lines will be drawn when constructing an inscribed square.

Hope this helped :)
4 0
3 years ago
Triangle WXY, with a vertex X at (3, 0), is rotated clockwise 270° about the origin. Which of the following rotations is equival
sergey [27]
What are the answer options?

A rotation of 270 would be equal to 630, 990, etc. Adding 360 degrees would result in the same rotation.

A rotation of 90 degrees counter-clockwise would also result in the same rotation, as would 90 plus any multiple of 360 if rotated counter-clockwise.
8 0
3 years ago
Read 2 more answers
A woman has eight keys on a key ring, one of which fits the door she wants to unlock. Sherandomly selects a key and tries it. If
natulia [17]

Answer:

The expected number of keys she will try before she opens the door is 4.5.

Step-by-step explanation:

A woman has eight keys on a key ring, one of which fits the door she wants to unlock.

Each of them is equally as likely to be the one to work, which means that this situation is represented by an uniform distribution with lower bound a = 1 and upper bound b = 8.

Find the expected number of keys she will try before she opens the door.

The expected value of the uniform distribution is given by:

E = \frac{a + b}{2}

Considering a = 1, b = 8, as is the case in this exercise:

E = \frac{1 + 8}{2} = 4.5

The expected number of keys she will try before she opens the door is 4.5.

3 0
2 years ago
Need help please again
joja [24]

Answer:

4 hours

Step-by-step explanation:

writting only because answer need 20 words

4 0
2 years ago
Read 2 more answers
When the price is $ 40 per radio, a producer will supply 90 radios each month for sale. For each $4 increase in price the produc
SVEN [57.7K]

Price for a radio = $ 40 for supply 90 radios in a month.

Ratio of increase in price to the number of radios supplies in a month 4:8 that is 1:2.

New unit price given  = $76.

Difference in unit price given in starting and New unit price = 76-40=$36

So, increase in unit price = $36.

Let us assume number of supplied increased  = x radios for increase in unit price $36.

So, we can setup a perportion as,

1/2 = 36/x.

On cross multiplication, we get

1*x = 2*36

x= 72.

So, 72 is the increased number of radios in 90 radios.

That is 72+90 = 162 radios each month.

Therefore, 162 radios are supplied if their per unit price is $76.

5 0
3 years ago
Other questions:
  • Describe the pattern in the sequence. Find the next two terms of the difference -2, -5,-8, -11
    9·1 answer
  • Write an expression to represent the perimeter of the rectangle:<br>2/3x+10<br>1/3x+5
    10·1 answer
  • A copy machine makes 143 copies in 3 minutes and 15 seconds. How many copies does it make per minute?
    13·2 answers
  • Which of the following graphs shows b &lt; 4 ?
    9·2 answers
  • A friend has placed a large number of plastic disks in a hat and invited you to select one at random. He informs you that they h
    5·1 answer
  • SOMEBODLY PLZ HELP ASAP! Find x
    15·2 answers
  • HELPP!! Points A and B are on the different sides on line l, the distance between point A and the line l is 10 in, the distance
    13·1 answer
  • Pls help ill mark brainliest
    5·1 answer
  • Show your solution follow the steps need an answer, please need an answer, please.​
    12·2 answers
  • Help :
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!