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
konstantin123 [22]
4 years ago
12

How to do this question plz answer me step by step plzz plz ​

Mathematics
1 answer:
aliya0001 [1]4 years ago
5 0

Answer:

adult cost £7, child cost £2

Step-by-step explanation:

let a represent an adult and c a child , then

2a + 3c = 20 → (1)

a + 4c = 15 → (2)

Multiplying (2) by - 2 and adding to (1) will eliminate a

- 2a - 8c = - 30 → (3)

Add (1) and (3) term by term to eliminate a, that is

- 5c = - 10 ( divide both sides by - 5 )

c = 2

Substitute c = 2 into either of the 2 equations and evaluate for a

Substituting into (2)

a + 4(2) = 15

a + 8 = 15 ( subtract 8 from both sides )

a = 7

The cost of an adult ticket is £7 and a child ticket is £2

You might be interested in
Sell more than you buy and prosper. If you export more than you import, you will be rich.
Stella [2.4K]
1: groups of prominent citizens who wrote back and forth between colonies
2: document that gave the english rights they had been denied
3: sell more than you buy
4: had to buy british stamp for every price of printed paper
5: taxes on lead glass, paper, paint, tea
6: colonists dresses up as indians, climbed on a ship, threw 342 chests of tea
7: a hothead
8: started committees of correspondence
9: group of colonists who formed a secret society
10: wrote pamphlets about war
11: roused many colonists to demand independence
12: member of virginia house of burgesses
13: american who wanted to be free of british rule
14: house where soldiers lived
15: american who supported the king
16: group of delegates who meet for discussion
17: british soldier during american revolution
4 0
4 years ago
If x + y =6, y +z = 7 and z + x =9, what is the average (arithmetic mean) of<br> x,y and z?
nadya68 [22]

Answer:

\frac{22}{3}

Step-by-step explanation:

x + y + y + z + z + x = 2x + 2y + 2z = 22

x + y + z = 22

22 ÷ 3 = \frac{22}{3}

8 0
3 years ago
Jaylyn rode her bike Ina a bike thon. she rode 33.48 miles in 2.7 hours. of she rode at the same speed, what was her speed in mi
andrey2020 [161]
She was going 14.4 mph. hope it helps!
5 0
3 years ago
Which value is the solution to the equation 20=y+12 ? ( use substitution to find solutions to equations.)
amm1812

Answer:

8 = y

Step-by-step explanation:

In order to find a solution to an algebraic equation such as this one we simply need to isolate the variable. We do this by applying the opposite operation to each side in order to get rid of the other factors and get the variable alone. Like so...

20 = y + 12   ... we need to subtract 12 from both sides to get rid of the 12 on the right side with the variable y.

20 - 12 = y + 12 - 12

8 = y

Finally, we can see that the value of the variable y is 8

8 0
3 years ago
Write an equation of the line that passes through point p and is perpendicular to the line with the given equation
goldenfox [79]
Do you have the specific point??

Remember, if 2 lines are perpendicular, their slopes are opposite reciprocals. So if one line has a slope of 4, the other line should have a slope of -1/4.

Hopefully your equation is in y=mx+b form. If so,

make sure you know slope (m) and the y-intercept. After this is done, plug in the points from p for y and x, and make sure to turn m into -1/m. Solve for b, and your new equation should be y=(new slope)x+(new y-intercept)
5 0
3 years ago
Other questions:
  • Select all the correct answers.
    5·2 answers
  • Evaluate the following algebraic expression if a equals 3 and b equals 4 2a^+5b
    10·1 answer
  • carla is renting a canoe. it costs $80 for 2 hours and $110 for 4 hours. what is the rate of change for this situation?
    14·2 answers
  • A loan with a balance of $210,000 prior to the June 1 payment was figured with interest at 5% annually and monthly principal and
    12·1 answer
  • The first soccer team scored 8 goals in 4 games. The second soccer team scored 27 goals in 9 games. Which soccer team scored mor
    6·2 answers
  • What is the surface area of this regular pyramid?
    8·1 answer
  • Which expression is equivalent to (x4) -5
    13·1 answer
  • Find the 9th term of the geometric sequence 10, 40, 160, ...​
    15·1 answer
  • Find the surface area of the triangular prism
    12·1 answer
  • Pls help asap<br> ………………
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!