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konstantin123 [22]
3 years ago
12

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

Mathematics
1 answer:
aliya0001 [1]3 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

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4.73, the decimal was moved 4 places to the left. so the scientific notation is
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3 years ago
If i only have 1/3 cups how many 1/3cups do i need to make a cup? answer asap!?​
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A bag contains 10 tiles with the letters A, B, C, D, E, F, G, H, I, and J. Five tiles are chosen, one at a time, and placed in a
lora16 [44]
I assume in this item, we are to find at which step is the mistake done for the calculation of the unknown probability. 

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This is similar as to what was done in Meghan's work.

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3 years ago
I’m not very sure how to simplify the two bottom rows, can someone help me?
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Answer:

The simplification is done below.

Step-by-step explanation:

(\sin(\frac{\pi}{6})\cos(\frac{\pi}{4}) - \sin(\frac{\pi}{4})\cos(\frac{\pi}{6}))^{2}

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5 0
3 years ago
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Answer:

\frac{2(x + 4)}{3} - 8 = 32

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2x = 96 + 24 - 8

2x = 112

x = 56

5 0
2 years ago
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