Formulas Flashcards
0
Q
What is the formula for combination
A
N!/(n-r)!r!
- n= # of objects
- r = # of choosing
1
Q
What is the for permutation?
A
N!/(n-r)!
*! Means multiply all numbers till you reach 0.
2
Q
Volume of a sphere
A
V= 4/3(pi) times r cubed
3
Q
Percent of change
A
Amount of change over the original
4
Q
To find reflection on graph…
A
(x,y) = (x,-y)
5
Q
Translation(slide)on a graph…
A
Slide
6
Q
Dilation
A
Enlarge or reduce
7
Q
To rotate on a graph…
A
Rotate X and Y and make Y negative
8
Q
F(x) means…
A
Y
9
Q
Horizontal slope?
A
0
10
Q
1/0 slope?
A
Vertical( can’t define)
11
Q
Formula for slope
A
Y2-y1/x2-x1
12
Q
Slope intercept form
A
Y= mx+b
13
Q
Point slope form
* use to find y intercept
A
Y-y1=m(x-x1)
14
Q
Standard form
A
AX +by= C
* a can’t be negative
No fractions!
