Algebra L9-5 Quiz v3
By Sam Schneider
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Last updated about 1 year ago
6 Questions
1 point
1
Question 1
1.
Which value of c completes the square in the expression x^{2}-16x+c?
Which value of c completes the square in the expression x^{2}-16x+c?
1 point
1
Question 2
2.
Use completing the square to determine which of the following gives solutions to 3x^{2}-18x+2=17.
Use completing the square to determine which of the following gives solutions to 3x^{2}-18x+2=17.
1 point
1
Question 3
3.
Solve x^{2}+14x+5=0 by completing the square. Identify all of the solutions.
Solve x^{2}+14x+5=0 by completing the square. Identify all of the solutions.
1 point
1
Question 4
4.
The procedure for completing the square is mostly the same as the procedure to convert a quadratic function from standard form into vertex form. Which is the vertex form of the function f(x)=-5x^{2}+60x+7?
The procedure for completing the square is mostly the same as the procedure to convert a quadratic function from standard form into vertex form. Which is the vertex form of the function f(x)=-5x^{2}+60x+7?
1 point
1
Question 5
5.
What is the vertex of the function f(x)=-5x^{2}+60x+7?
Nota Bene: A vertex of a function is a point on the coordinate plane. If your answer is not a complete and accurate specification of such a point using conventional notation, you will not get full credit.
What is the vertex of the function f(x)=-5x^{2}+60x+7?
Nota Bene: A vertex of a function is a point on the coordinate plane. If your answer is not a complete and accurate specification of such a point using conventional notation, you will not get full credit.
3 points
3
Question 6
6.
\color{blue}{\mathbb{Show. Your. Work.}} (you can do it on paper and hand it in).
The function h(t)=-9t^{2}+18t+20 models the height in meters, h(t), of a rocket t seconds after being launched from an 20-meter-high platform.
A) How many seconds does it take for the rocket to reach its maximum altitude?B) What is the rocket's maximum altitude?
\color{blue}{\mathbb{Show. Your. Work.}} (you can do it on paper and hand it in).
The function h(t)=-9t^{2}+18t+20 models the height in meters, h(t), of a rocket t seconds after being launched from an 20-meter-high platform.
A) How many seconds does it take for the rocket to reach its maximum altitude?
B) What is the rocket's maximum altitude?