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3 years ago

Use the elimination method to solve the system of equations. Choose the

Mathematics

1 answer:

Yakvenalex [24]3 years ago

5 0

Answer:

(2, 7) is the correct ordered pair.

Step-by-step explanation:

5x + 3y = 31

2x + 3y = 25 Subtract to eliminate the y variable:

3x = 6

x = 6/3

x = 2.

Substitute x = 2 in the first equation:

5*2 + 3y = 31

3y = 31-10 = 21

y = 21/3

y = 7.

Check the result by substituting for x and y in the second equation:

2(2) + 3(7) = 25

4 + 21 = 25

25 = 25.

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If the average of x and y is 11 and the average of x, y and z is 5, what is the value of z?

mixer [17]

Answer:

z = -17

Step-by-step explanation:

If the average of x and y is 11, then;

x+y/2 = 11

x+y = 2 + 11

x+y = 22 .... 1

similarly, if average of x, y and z is 5, then;

x+y+z/3 = 5

x+y+z = 3*5

x+y+z = 15

Since x+y = 22

22 + z = 5

z = 5 - 22

z = -17

Hence the value of z is -17

4 0

2 years ago

Help me fast

Dmitry [639]

Y= x2+2 is the correct answer

7 0

2 years ago

O gráfico a seguir mostra o grau de escolaridade dos 112 empregados de uma empresa de acordo com esses dados quanto por cento de

solmaris [256]

Answer:

$\frac{68}{112}\approx 0.61=61\%$

Step-by-step explanation:

Gráfico recuperado mostra os seguintes dados:

Fundamental Incompleto: 14

Fundamental: 16

Médio Incompleto: 14

Médio: 54

Superior Incompleto: 14

Os funcionário que concluíram o Ensino Médio são 54 (Médio) +14 (Superior Incompleto. Basta somar (54+14)e dividir pelo total de funcionários (112).

$\frac{68}{112}\approx 0.61=61\%$

5 0

3 years ago

Find the length of the third side. If necessary, round to the nearest tenth.

gulaghasi [49]

Answer might be: 24

8 0

3 years ago

2 ^( 3 - 9) - 11 how do I solve this

Setler [38]

2^(3-9)-11 =

1 step: subtract the 3 and 9 to get 6

(3-9)=6

2 step: multiply 2 to its self 6 times and
you should get 64

2*2=4*2=8*2=16*2=32*2=64

3 step: subtract 11 by 64 to get 53

64-11=53

hope I help if so hit the brainliest thanks

5 0

3 years ago