stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Math 9 Summary Flashcards | StudBud
Explore
/
Math 9 Summary
What is the sum of the interior angles of an octagon?
2(x+8)
Math 9 Summary
32 terms
·
StudBud Administration
·
21 plays
Imported from external platform
Flashcards
32 cards
F
Practice quiz
P
Host live
L
Questions
32
Answers
1
2(x+8)
2x+16
2x+8
2x+14
x+16
2
What is the sum of the interior angles of an octagon?
540°
1080°
1440°
720°
3
What is the explicit formula for a geometric sequence?
gn = gn-1 + 2
g(n)=g*rg-1
g(n) = g(1)*rn-1
n(g)=ng2
4
(x - 3)(2x + 9)
2x2 + 3x - 27
3x + 6
2x2 - 3x - 27
2x2 + 6x - 27
5
What do you use when there is a coefficient of 1 or -1 when solving a system of equations?
Elimination
Substitution
Graphing
Any
6
What is the equation for a rotation 90° counterclockwise around the origin?
R0,90o(a,b) = (-b,a)
R0,180o(a,b) = (-a,-b)
ry-axis(a,b) = (-a,b)
rx-axis(a,b) = (a,-b)
7
What is the domain of the graph?
(-6 ≤ x ≤ 1)
(-6, 1)
(-8 ≤ x ≤ 3)
(-∞,∞)
8
(4235/283*3/1.8883)
0
1
47.536
23.77482017
0
9
What is the equation of this line in slope intercept form?
y = -4/3x + 1
y = 3/4x - 1
y = 4/3x - 1
y = -4/3x - 1
10
What is the point that produces the least total distance to all 3 vertices called?
Circumcenter
Incenter
Orthocenter
Fermat Point
11
Identify the inequality in the graph
y ≤ 2x - 3
y ≥ 2x - 3
y > 2x - 3
y < 2x - 3
12
What is the length of side a in the triangle pictured?
a / tan(47) = a
a * tan(47) = a
8 * tan(47) = a
8 / tan(47) = a
13
Which proves two triangles are similar?
All of the above
SSS
SAS
AA
14
What is the word for predicting a point within data?
Interpolation
Extrapolation
Rate of change
Function
15
Solve the system
(1, -1)
(4, 8)
(5, 4)
(4, 5)
16
Given the distances and slopes shown, what kind of shape MUST this be? Be as specific as possible.
square
rhombus
rectangle
parallelogram
17
What is the 101
st
term of this sequence?
305
314
308
311
18
What is slope intercept form?
dog + cat = fish
y = mx + b2
y = mx + b
m1 - m2 = y3
19
Which is not a rigid transformation?
translation
dilation
reflection
rotation
20
What is the acronym to remember what ratios go with sine, cosine, and tangent?
SOAP CAN TOAD
TAH SOH COA
SOH CAH TOA
COH TAH SOA
21
What type of function is shown?
exponential
linear
absolute value
quadratic
22
Equation for exponential functions
f(x) = ax2 + c
f(x) = abx
y= mx + b
f(x) = |x|
23
5
-3
-125
1/125
5/3
-5/3
24
Which trigonometry function do you use to solve for x on the above triangle?
cosine
none of the above
sine
tangent
25
Which does not prove triangle congruence?
SAS
AAS
SSA
SSS
26
What is the definition of a function?
Each output has multiple inputs
Each input only has one output
Each output only has one input
Each input has multiple outputs
27
Solve for x: |x + 3| = 7
x = 4
x = 4 or x = -10
x = 4 or x = -4
x = -4
28
Which is not a common representation for a function?
algorithm
table
graph
equation
29
How does a relate to c and e?
a is half the value of ce
a is twice the value of ce.
a is the geometric mean of c and e
a is the value of ce squared
30
Solve for t: A=p+prt
t = p-a/pr
t = A-p/pr
t = 2p+r/a
t = 2p-a/r
31
What are the names of the two sequences we learned this year?
Algebraic and Explicit
Explicit and Exponential
Arithmetic and Geometric
Geometric and Exponential
32
What is the correlation coefficient of this graph?
-0.1
0.9
-0.9
0.1
