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Math Flashcards

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0
Q

Lowest common multiple

A

It is the lowest common multiple is the smallest number that two given numbers can both fit into evenly by multiplication
Ex: LCMS of 12 and 8= 24

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1
Q

How to simplify equations

A

Plug and chug

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2
Q

Greatest common divisor

A

It is the largest number that can be divided by both given numbers without a remainder
Ex: GDC of 12 and 8=4

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3
Q

How to find LCM and GCD

A

Plug and chug

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4
Q

How to add/subtract fractions

A

Find a coop on denominator and solve

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5
Q

How to compare fractions

A

Covert them to decimals ( and to make them a percentage move the decimal to the right two places.)

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6
Q

Of means ….

A

Multiply

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7
Q

Is means ……

A

Equal

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8
Q

Linear equations are what

A

They are equations that can be graphed on a number line
Ex:6\X=2
=3

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9
Q

How do you solve basic linear equations

A

Plug and chug

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10
Q

On probiotic problems with or questions

A

Don’t count things that over lap

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11
Q

Mean

A

The mean is the average of a set of numbers. Add up all number and divide by the total.

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12
Q

Median

A

The median is the middle number when the numbers are arranged in numerical order. If odd number of numbers it’s the middle one if it an even number of numbers it the average between the two middle ones.

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13
Q

Mode

A

Data that occurs the most. To find it count.

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14
Q

How many distinct prime factors does 42 have

A

42=7X6=3X2X7

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15
Q

How to solve polynomials

A

Foil them

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16
Q

What does a quadratic formula look like

A

Ax^2+bx+c

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17
Q

How to solve a quadratic equation

A 
First try and plug in the numberS!!!
If there is only one number answers ZIP-
- zero it out 
-input the + or - signs into your parentheses ( x) ( x)=0
- factor it out to solve it
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18
Q

How to input signs on inputting the signs

A

If c is negative the (x+ ) ( x- )
If c positive and b is positive then (x+ ) (x+ )
If c is positive and b is negative the. (x- ) (x- )

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19
Q

Inequalities are what

A

Equations with greater than or less that symbols

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20
Q

How to solve complex number problems

A

Flip and Foil
Flip- mulitiply it By its self change the sign I’m the denominator and then putting that on top to
Foil- do top and bottom, add like terms replace i^2 with -1

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21
Q

Inequalities are what

A

Equations with greater than or less that symbols

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22
Q

How to solve complex number problems

A

Flip and Foil
Flip- mulitiply it By its self change the sign I’m the denominator and then putting that on top to
Foil- do top and bottom, add like terms replace i^2 with -1

23
Q

What is distance formula

A

Square root of ((X2-X1)^2+(Y2-Y1)^2)

24
Q

Midpoint Formula

A

( X2+X1/2 Y2+Y1/2)

25
Q

What is Slope Formula

A

Y2-Y1/X2-X1

26
Q

How to tell how many intercepts a parabolas has?

A

If b^2-4ac > 0 you will have two
If b^2-4ac= 0 you will have one
If b^2-4ac< 0 you will have none

27
Q

Parabola shapes

A

A> 0 U-Shaped
A< 0 N-Shaped
Fraction fat
Whole number skinny

28
Q

What to do if asked for the intercepts of a parabola formula

A

ZIF it up

29
Q

Formula for a circle

A

(x-h)^2+(y-k)^2=r^2
X and Y correspond to the axis on the coordinate plane.
(h,k) is the center of the circle
r= radius

30
Q

How to tell if a circle goes through a point?

A
  • Change the signs for h and k
  • input the point into x and y
  • square what you get for the radius
31
Q

Straight line

A

180

32
Q

Right angle

A

90

33
Q

Angle addition rule

A

Two smaller angles within a larger angle will add together to the measure of the larger angle.

34
Q

Opposite angle rule

A

If two lines cross each other, 4 angles will be formed, and the opposites will be equal. If you look at the letter X, the angle at the top and bottom are equal, and the angles on the left and right side are equal. No matter where the line crosses, The top will match the bottom and. the left will match the right

35
Q

Define bisects

A

Cuts the angle equally in two

36
Q

What do you do with triangle questions

A

Label them as you go

37
Q

Properties of a quadrilaterals

A
  • all interior angles up to 360
  • the perimeter can be found by adding up all the sides
  • area is based times height
38
Q

How to find the area of a quadrilateral

A

Cut it into pieces

39
Q

Radius

A

Any line from the center of the circle to a point on the circle

40
Q

Diameter

A

Any line from a point on the circle to the opposite side which passes through the center

41
Q

Circumference

A

The perimeter of the circle. The formula is C=2pieR

42
Q

Area

A

All the space inside the circle. The formula is a=pieR^2

43
Q

Sector

A

Any triangle piece cut out by two radii. It’s like a slice of pizza.

44
Q

Arc

A

The edge cut out by two radii. It’s like the crust of a piece of pizza .

45
Q

Chord

A

Any line connecting one point of a circle to another, but not necessarily opposite points ( which would be a diameter). Every diameter is a chord, but not every chord is a diameter.

46
Q

Tangent

A

A line perpendicular to the radius that touches the circle in one spot. If you stood a coin up on its edge on a table, the coin would be the circle and the surface of the table would be tangent to the coin.

47
Q

Pythagorean theorem question

A

Square root of a^2+b^2 or plug and chug

48
Q

Parallel line

A 
A= d, e, h
B= c, f, g
49
Q

Formulas for a cube

6 sides figure

A

Volume: L x W x H
Surface area:
- regular cube ( looks like a die) L x W x 6= S
-Rectangular cube( looks like a shoe box ) 2 x L x W + 2 x H x W + 2 x H x L= S

50
Q

Formulas for a Sphere

A

Volume: 4/3PieR^3

Surface area: 4PieR^2

51
Q

Cylinder

A

Volume: PieR^2H

Surface area: 2PieRH

52
Q

Cone

A

Volume: 1/3PieR^2H

Surface area: PieR square root of R^2+H^3

53
Q

Sine

A

Opposite/Hypotenuse

54
Q

Cosine

A

Adjacent/Hypotenuse

55
Q

Tangent

A

Opposite/Adjacent

ACT (5 decks)

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