Suppose you are an algebra teacher grading the following solution on an examination: − 3 ( x − 6 ) = 2 − x − 3 x − 18 = 2 − x − 2 x − 18 = 2 − 2 x = − 16 x = 8 You should note that 8 checks, so the solution set is (8). The student who worked the problem therefore wants full credit. Can you find any errors in the solution? If full credit is 10 points, how many points should you give the student? Justify your position.
Suppose you are an algebra teacher grading the following solution on an examination: − 3 ( x − 6 ) = 2 − x − 3 x − 18 = 2 − x − 2 x − 18 = 2 − 2 x = − 16 x = 8 You should note that 8 checks, so the solution set is (8). The student who worked the problem therefore wants full credit. Can you find any errors in the solution? If full credit is 10 points, how many points should you give the student? Justify your position.
Solution Summary: The author explains that the student's final answer is correct, but the steps in the question are wrong.
Suppose you are an algebra teacher grading the following solution on an examination:
−
3
(
x
−
6
)
=
2
−
x
−
3
x
−
18
=
2
−
x
−
2
x
−
18
=
2
−
2
x
=
−
16
x
=
8
You should note that 8 checks, so the solution set is (8). The student who worked the problem therefore wants full credit. Can you find any errors in the solution? If full credit is 10 points, how many points should you give the student? Justify your position.
I want to learn this topic l dont know anything about it
Solve the linear system of equations attached using Gaussian elimination (not Gauss-Jordan) and back subsitution.
Remember that:
A matrix is in row echelon form if
Any row that consists only of zeros is at the bottom of the matrix.
The first non-zero entry in each other row is 1. This entry is called aleading 1.
The leading 1 of each row, after the first row, lies to the right of the leading 1 of the previous row.
PRIMERA EVALUACIÓN SUMATIVA
10. Determina la medida de los ángulos in-
teriores coloreados en cada poligono.
⚫ Octágono regular
A
11. Calcula es número de lados qu
poligono regular, si la medida
quiera de sus ángulos internos
• a=156°
A= (-2x+80
2
156 180-
360
0 = 24-360
360=24°
• a = 162°
1620-180-360
6=18-360
360=19
2=360=
18
12. Calcula las medida
ternos del cuadrilá
B
X+5
x+10
A
X+X+
Sx+6
5x=3
x=30
0
лаб
• Cuadrilátero
120°
110°
• α = 166° 40'
200=180-360
0 =
26-360
360=20
ひ=360
20
18 J
60°
⚫a=169° 42' 51.43"
169.4143180-340
0 = 10.29 54-360
360 10.2857
2=360
10.2857
@Sa
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Linear Equation | Solving Linear Equations | What is Linear Equation in one variable ?; Author: Najam Academy;https://www.youtube.com/watch?v=tHm3X_Ta_iE;License: Standard YouTube License, CC-BY