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Liula [17]
3 years ago
9

HELLPPP ME PLEASEE!!!!!! PLEASE AND THANK YOU!!!

Mathematics
2 answers:
elena-s [515]3 years ago
8 0

Answer:

15 children and 5 adults

Step-by-step explanation:

Lets call the adults 'a' and the children 'c'.

We know that 20 tickets by a family was purchased so a + c = 20.

We also know that the total cost of the tickets was $100 and one adult ticket cost $8 and one child cost $4 so 8a + 4c = 100

Now we have simultaneous equations,

α) a + c = 20

β) 8a + 4c = 100

→ Multiply α) by 8 to make the same 'a' coefficient

α) 8a + 8c = 160

β) 8a + 4c = 100

→ Minus the α) from β)

4c = 60

→ Divide both sides by 4 to work out how many child tickets were bought

c = 15

→ Substitute the value of c = 15 back into the equation of a + c = 20

a + 15 = 20

→ Minus 15 from both sides to work out how many adult tickets were bought

a = 5

balandron [24]3 years ago
4 0
So there are 20 people in the family.
The total cost of the tickets were $100. Tickets for adults cost $8 and children cost $4.
To find the answer for the number of adults you need to divide the $100 by $8 and do the same for children but divide the $100 by $4.
So 5 of the family members were adults and 15 were children.
5 adults = $40
15 children = $ 60
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goldenfox [79]

Answer:

Option D y=3

Step-by-step explanation:

The question in English is

Which of the following functions is a constant function?

we know that

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so

<u><em>Verify each case</em></u>

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case C) x=y+3

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case D) y=3

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3 0
3 years ago
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Step-by-step explanation:

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6 0
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Step-by-step explanation:

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In order to isolate w on one side, we should times 7 as the numerator in order to eliminate the 7 in the denominator. To promise equality, we need to multiply 7 on both sides in order to isolate w and solve the equation.

<h2>Thus, it is multiplication.</h2>
4 0
3 years ago
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Ipatiy [6.2K]

Answer:

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Step-by-step explanation:

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8 0
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Tcecarenko [31]

Answer:

Option C. The volume of the sphere is equal to 904\ ft^{3}

Step-by-step explanation:

we know that

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