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
Greeley [361]
2 years ago
5

Two school groups go to a roller skating rink. One group pays $243 for 36 admissions and 21 skate rentals. The other group pays

$81 for 12 admissions and 7 skate rentals. Let x represent the cost of admission and let y represent the cost of a skate rental. Is there enough information to find values for x and y? Explain.
thxs
Mathematics
2 answers:
Masteriza [31]2 years ago
7 0

Answer:

No

There are infinitely many solutions to the system.

{36x+21y=24312x+7y=81

Multiply the second equation by 3.

3(12x+7y36x+21y=81)=243

Subtract this new equation from the first equation.

36x+21y−(36x+21y0+0=243=243)=0 true

Evgen [1.6K]2 years ago
7 0

Answer:

Step-by-step explanation:

this is how to be focused in class

You might be interested in
How much is 5/6 times 2 3/4
Anit [1.1K]
5/6 x 2 3/4 = 5/6 x (2x4+3)/4 = 5/6 x 11/4 = 55/24 = 2 7/24
6 0
3 years ago
Read 2 more answers
At a cafe , the cook uses a recipe that calls for eggs and milk have a proportional relationship. Complete the table.
SVEN [57.7K]

Answer:

Milk over eggs is gonna be 3 over 1

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Iv)
vichka [17]

Answer:

Her daughters age: 1/2x

Step-by-step explanation:

Let's say Rani's present age is x. Her age is twice the age of her daughter.

So if Rani's age is 20, her daughters age would be 10, because Rani is twice the age of 10; so 10 times 2 would be 20.

1/2(20)=daughter's age

so if you substitute x into 20 because we don't actually know Rani's age, it would be 1/2(x)=daughter's age.

hope this helped :-) <3

3 0
3 years ago
The price of a cup of coffee was $2.75 yesterday. Today, the price fell to $2.40. Find the percentage decrease. Round your answe
Fed [463]

Answer: (2.75-2.40)/(2.75) * 100 [Before rounding to the nearest tenth]

Step-by-step explanation:

Formula for percentage decrease = (old-new)/(old) * 100

so substituting in, you get (2.75-2.40)/(2.75) * 100

From here, you can just plug this into a calculator (don't have on me rn)

8 0
2 years ago
Find the derivative of f(x)=x+1/x-1 using first principal​
zepelin [54]

f ' ( x ) = 1 ( x + 1 ) 2

 

Explanation:

differentiating from first principles

f ' ( x ) = lim h → 0

 

f ( x + h ) − f ( x ) h

f ' ( x ) = lim h → 0

 x + h x + h + 1 − x x + 1 h

the aim now is to eliminate h from the denominator

f ' ( x ) = lim h =0  

( x + h ) ( x + 1 )− x ( x + h + 1) h ( x + 1 ) ( x + h + 1 )

f ' ( x ) = lim h → 0

 x 2 + h x + x + h − x 2 − h x − x h ( x + 1 ) ( x+h + 1 )

f ' ( x ) = lim h → 0

 

h 1 h 1 ( x + 1 ) ( x + h +1 )

f ' ( x ) = 1 ( x + 1 ) 2

5 0
3 years ago
Other questions:
  • The sum of two numbers is 18 . the difference of the two numbers is -2 find the numbers
    12·1 answer
  • Reparametrize the curve with respect to arc length measured from the point where t = 0 in the direction of increasing t. (Enter
    10·1 answer
  • What is the perimeter of rhombus WXYZ?<br><br> units<br> 12 units<br> units<br> 20 units
    12·1 answer
  • Do you guys know this one
    15·1 answer
  • The weekly salaries of sociologists in the United States are normally distributed and have a known population standard deviation
    14·1 answer
  • Solve the system using substitution. Show all work.
    13·1 answer
  • George is given two circles, Circle O and circle X, as shown. If he wants to prove that the two circles are similar, what would
    13·1 answer
  • Janelle has 3.6 yards of wire, which she wants to use to make bracelets. She needs 0.3 yard for each bracelet. Altogether, how m
    9·1 answer
  • A circular pizza that is 18 inches in diameter is cut into 7 equal slices. What is the area of a single slice?
    5·1 answer
  • Can you tell which of the following triangles are right and explain your answer? The numbers represent the lengths of the sides:
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!