How much distance do you need to bring your car to a complete stop? A function used by those who study automobile safety is d ( x ) = − x 2 20 20 + x , Where d ( x ) is the stopping distance, in feet, for a car traveling at x miles per hour. a. If it takes you 40 feet to come to a complete stop, how fast was your car traveling? b. The graph of the quadratic function that models stopping distance is shown identify your solution from part (a) as a point on the graph. c. Describe the trend shown by the graph.
How much distance do you need to bring your car to a complete stop? A function used by those who study automobile safety is d ( x ) = − x 2 20 20 + x , Where d ( x ) is the stopping distance, in feet, for a car traveling at x miles per hour. a. If it takes you 40 feet to come to a complete stop, how fast was your car traveling? b. The graph of the quadratic function that models stopping distance is shown identify your solution from part (a) as a point on the graph. c. Describe the trend shown by the graph.
Solution Summary: The author calculates the speed of the car if it takes 40 feet to come to a complete stop.
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
Please help I'm a working mom trying to help my son last minute (6th grader)! Need help with the blank ones and check the ones he got with full calculation so we can use it to study! Especially the mixed number fractions cause I'm rusty. Thanks in advance!
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