QUADRATICS
Convert to vertex form:
y = x2 -2x -5
y= (x - 1)2 - 6
Reflect point (2,5)o across the x-axis.
What is (2,−5) ?
Which of the following does NOT prove triangle congruence?
A. SSS
B. SAS
C. AAA
D. ASA
What is AAA?
If a card is drawn and NOT replaced, are the events dependent or independent?
If a card is drawn and NOT replaced, are the events dependent or independent?
Expand:
(4x2+2x−8)(x+2)
4x3+10x2−4x−16 ?
What is the vertex of:
y=x2−4x+7
(2, 3)
A polygon is rotated 90∘ counterclockwise and then dilated by 3.
What rule describes the transformation?
What is (x,y)→(−3y,3x)
A coin is flipped twice. What is the probability of getting two heads?
1/4
Class has 10 girls and 14 boys.
Probability all 3 selected students are boys.
What is approximately 0.198?
simplify sqrt(20a2b4
2ab2sqrt5
How many roots do these functions have?
f(x)=3x2+6x−8
g(x)=(x−3)2
What is f(x) has two real roots and g(x) has one real root”?
A segment with endpoints (2,3) and (4,6) is dilated by scale factor 1/3.
What are the image endpoints?
What is (1/3,1)\/ and (2/3,2)
What transformation changes the size of a figure but keeps the shape the same?
Dilation
If W={2,3,5,7,11} and X={1,3,4,7,9,11}
find W∩X
3, 7, 11
Find the intersection point of:
x=8
and
y=x2+2x
(8, 80)
State the vertex, axis of symmetry, and roots:
g(x)=−x2+3x+2
Vertex: (1.5,4.25)
Axis: x=1.5
Roots: x=−0.5, 4
Describe the transformation between:
h(x)=3x2−9x+12
h′(x)=3x2+9x+12
What is reflection across the y-axis?
A reflection across the x-axis changes:
A. (x,y)→(−x,y)(x,y)
B. (x,y)→(x,−y)(x,y)
C. (x,y)→(−x,−y)(x,y)
D. (x,y)→(y,x)(x,y)
What is (x,y)→(x,−y)(x,y)
Cost per person varies inversely with number of skaters.
60 skaters cost $9.60 each.
What about 120 skaters?
What is $4.80?
What is the end behavior of:
y=x4+2x2
What is both ends up?
A quadratic has a maximum at (2,24) and passes through (0,12).
Find the equation.
What is y=−3(x−2)2+24?
Translation right 5, up 2, then dilation by 2.
free
Free Points
Simplify:
sqrt32
A. 4sqrt2
B. 8sqrt2
C. 162sqrt2
D. 2sqrt2
4sqrt2
A bag contains 3 red marbles and 7 blue marbles.
What is the probability of selecting a red marble?
3/10