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Sergeeva-Olga [200]
3 years ago
8

2x-y=6 and 5x+10y=-10

Mathematics
1 answer:
horsena [70]3 years ago
6 0
2x - y = 6
5x + 10y = -10

<span>( 2x - y = 6 ) * 5
</span>10x - 5y = 30

<span>( 5x + 10y = -10 ) * 2
</span>10x + 20y = -20

If we subtract the last 2 equations,
30y = -50
y = -(5/3)

2x - (-5/3) = 6
2x + (5/3) = 6
2x = 6 - (5/3)
2x = (18-5)/3
2x = 13/3
x = 13/6

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At a regional soccer​ tournament, tickets for two adults and seven students cost ​$60. Tickets for three adults and eleven stude
den301095 [7]

Answer:

The price of an adult ticket is $9 and the price of a student ticket is $6

Step-by-step explanation:

Create a system of equations where x is the price of an adult ticket and y is the price of a student ticket:

2x + 7y = 60

3x + 11y = 93

Solve by elimination by multiplying the top equation by 3 and the bottom equation by -2, to cancel out the x terms:

6x + 21y = 180

-6x - 22y = -186

Add them together:

-y = -6

y = 6

Then, plug in 6 as y into one of the equations to solve for x:

2x + 7y = 60

2x + 7(6) = 60

2x + 42 = 60

2x = 18

x = 9

So, the price of an adult ticket is $9 and the price of a student ticket is $6

8 0
3 years ago
HELP DUE IN 5 MINUTES​
iris [78.8K]

Answer:

4cm

Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
I need the answer. Please help.
Marysya12 [62]

Using the Pythagorean theorem:

WY =√(5^2 + 12^2)

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7 0
3 years ago
Evaluate the function k(x)=5 for the given value of x. Simplify your answer.
coldgirl [10]

Answer:

5

Step-by-step explanation:

k(x)=5 says I'm 5 no matter the value of x...

So therefore

k(-4)=5

k(56)=5

k(66378)=5

k(whatever)=5

k(x) is constantly 5 for whatever input x.

4 0
2 years ago
Giselle pays $210 in advance on her account at the athletic club. Each time she uses the club, $15 is deducted from the account.
weqwewe [10]

Answer:

A.b = 210 + 15x

B.b = 210 – 15x

C.b = 195 + 15x

D.b = 195 – 15x

Step-by-step explanation

B is correct. Your starting amount is 210$ And you're taking away 15$ each time she uses the club,x.

3 0
3 years ago
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