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Pani-rosa [81]
3 years ago
5

How can you use substitution method to solve a system of equations that does not have a variable with a coefficient of 1 or –1?

Mathematics
1 answer:
kap26 [50]3 years ago
6 0
You can multiply or divide one equation so that it has a variable with a coefficient opposite of the other equation.
Example:
A) 2x + 3y = 6
B) 4x +2y = 20
Notice that neither equation has a "1" or "-1"
Let's multiply Equation A) by -2
A) -4x -6y = -12 Then add it to B)
B) 4x +2y = 20
-4y = 8
y= -2

A) 2x + 3*-2 = 6
2x = 12
x = 6



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Tickets to a concert cost $50 for each orchestra seat and $40 for each
Vsevolod [243]

Answer:

H. the number of orchestra seat is 900

Step-by-step explanation:

Step one:

let the number of orchestra seat be x

and balcony seat be y

cost of orchestra= $50 each

cost of balcony =$40 each

total tickets= 1500

x+y= 1500----------1

amount earned= $69000

50x+40y=69000--------2

The system of equation for the situation is

x+y= 1500----------1

50x+40y=69000--------2

from 1, x=1500-y

put this in equation 2

50(1500-y)+40y=69000

75000-50y+40y=69000

-10y=69000-75000

-10y=-6000

divide both sides by -10

y=-6000/-10

y=600

put y= 600 in equation 1

x+600= 1500

x=1500-600

x=900

6 0
3 years ago
A number is multiplied to itself the product is 49/9 find the number​
Usimov [2.4K]

Answer:

the number is 20

Step-by-step explanation:

let 'n' represent the number

2n + 9 = 49

2n = 40

n = 40/2 = 20

8 0
2 years ago
3500 calories for 6 servings of pie ________ calories per serving is what?
OleMash [197]

Answer:

583 rounded to the nearest whole number

Step-by-step explanation:

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2 years ago
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First, drag a value to represent the missing angle in the triangle. Then, complete the trigonometry equality statements.
noname [10]

The missing trigonometric values are listed below:

  • Angle A = 90 - θ
  • sin 28°  =  cos (62°)
  • Cos 33°  =  sin 57°
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<h3>Meaning of Trigonometry</h3>

Trigonometry is a branch of mathematics that studies angles of triangles and its side length.

Trigonometry is so important that every student must come across this branch of mathematics.

In conclusion, the missing trigonometric values are listed above

Learn more about trigonometry: brainly.com/question/24349828

#SPJ1

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2 years ago
The effect of global climate change on the US economy was investigated by researchers at Carnegie Mellon University. To gauge th
AURORKA [14]

Answer:

Please see the attached file for the complete answer.

Step-by-step explanation:

Download pdf
4 0
3 years ago
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