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Elza [17]
3 years ago
8

Write and solve a system of equations to determine how many tickets were sold before and at the music festival. PLEASE HELPPP

Mathematics
1 answer:
strojnjashka [21]3 years ago
3 0

b = number of tickets sold before

a = number of tickets sold after

cost of a ticket = number of tickets times cost per ticket

before cost = 39.95b

after cost = 54.95a

total cost = 925000

39.95b + 54.95a = 925000

total number tickets = 20000

b + a = 20000

we have

39.95b + 54.95a = 925000

b + a = 20000

multiply second equation by -39.95 and add to first equation

39.95b + 54.95a = 925000

-39.95b-39.95a = -799000 +

0b+15a = 126000

15a = 126000

divide bot sides by 15

a = 8400

sub back

b + a = 20000

b+8400 = 20000

minus 8400 both sides

b = 11600

11,600 tickets sold before

8400 tickets sold after

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\boxed{ \bold{ \huge{ \boxed{ \text{k =   - 9}}}}}

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\text{el valor de k es  - 9}

------------------------------------------------------------

Translation in English:

Step 1 : Swap the sides of the equation

Step 2 : Divide both sides by 14

Step 3 : Calculate

\sf{Hope \: i \: helped ! }

\sf{Best \: regards !!}

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