Evaluacion Profesor Guillermo

  • June 2020
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Seguimiento de proyecto de matemáticas

1.

==

=

2

0=2(-4)+b 0=-8+b 8=b

8=2(0) + b 8=0+b

y=2x+8

8=b 2. Encuentra la ecuación para

M=-4

3, -3

y= - 4x+ 9

X, y

Y= mx+b

Y= -4x+b -3=-4(3) + b -3= -12 +b -3+12= b 9=b X 3 -3 Y -3

-8

21 41

3. A.

x + x = 2x-17 3

4

4x +3x = 2x-17 12

7x =2x – 17 12

7 – 24x = -17 12

-17x = -17 12

X= - 17(12) 17 X= 12

B. 2 - x -1 = 2x – 1 - 4x – 5 40

4

8

2 - x -1 = 16x -8 -16x - 20 40

32

2 - x -1=

-8- 20

40

2 - x -1= 40

32

- 28 32

80 – x – 1 = - 28 40

32

79x = - 28 40

32

32(79x) = -28 (40) 2528x =-1120

X= -1120 = -560 = -280 = -140 = -70 2528=

1264 632 316 158

4. A a. 6x – 2y + ƶ = 24 b. 2x + 5y - 2 ƶ = -14 c. X – 4y + 3 ƶ = 26

A + (-3) (b) 6x – 2y + ƶ = 24 -6x – 15y + 6 ƶ= 42 0- 17y + 7 ƶ = 66

Y= 66- 7 ƶ 17

A + (-6) (c)

6x – 2y + ƶ = 24 -6x + 24y - 18 ƶ = -156 0+ 22y - 17 ƶ = -132

Y= 17 ƶ - 132 22

66- 7 ƶ = 17 ƶ - 132 17

22

22(66- 7 ƶ) = 17(-132 + 17 ƶ)

1452 -154 ƶ = -2244+289 ƶ 1452 + 2244 = 289 ƶ + 154 ƶ 3696 = 443 ƶ

Ƶ= 3696 = 8,4 443

Y= 17 ƶ – 132 22

Y= 17(8,4) – 132 22

Y= 142,8 – 132 22

Y= 10,8 = 0,5 22

X – 4y + 3 ƶ = 26

X – 4 (0,5) + 3 (8,4) = 26 X – 2 + 25,2 = 26 X= 26 – 23,2 X= 2,8

Prueba

X – 4y + 3 ƶ = 26

2,8 – 4 (0,5) + 3 (8,4) = 26 2,8 – 2 + 25,2 = 26 2,8 + 23,2 = 26 26=26

B. a.12x –y – 6x -24 +2z = z b.5x +4x +18- 4z = 2x -2z +4 c.3x -4y-26=2x -3z

a.6x – 2y + ƶ = 24 b. 2x + 5y - 2 ƶ = -14 c. X – 4y + 3 ƶ = 26

A.Y= 5

B.Y= 3x+2 Y=3 (1) +2

Y= 3(2) + 2

Y= 3 + 2

Y= 6+2

Y= 5

Y= 8

X 1

2

3

Y 5

8

11

Y= 3(3) + 2 Y= 9+ 2

Y= 11

C. y= x/3

Y= 1/3

y= 2/3

y= 3/3

Y= 0,3

y= 0,6

y= 1

X

1

2

3

Y

0,3

0,6

1

D. x= 4

Grafico plano cartesiano

Solución:

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