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A penny = 1 cent
A nickel = 5 cents
A dime = 10 cents
A quater = 25 cents
A dollar = 100 cents
half-dollar = 50 cents

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How to solve perimeter of all the shape.

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How to solve perimeter of all the shape.

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Add all the sides

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How to find the surface area of a Cone./

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How to find the surface area of a Cone./

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πr²+πr√(h²+r²)

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n*(n-3)/2

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Pie times the radius squared.
(A = π r²)

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Diameter divided by 2 = radius

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-2²=4
-2³=-8
-2⁴=16
-2⁵=-32
....

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add all the side up=P

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To cross multiply is to go

from this:
8/12 = 2/3

to this:
8 × 3 = 12 × 2

In Algebra:
To cross multiply is to go
from this:
a/b = c/b

To this:
ad = bc

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Base a * base b divide by two and multiply by the height

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Volume=height times πr2

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The total has to add up to 180°

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Every answer can be x!!!

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1/3*πr²*h

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A=H*B/2

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If a point is 5cm away from the point, its reflect point is also 5cm away from the point, but going opposite side.

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πh/3*(R²+r²+Rr)

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Because a × b  =  b × a it is also true that a% of b  =  b% of a

Example: 8% of 50 = 50% of 8, which is 4

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To solve volume of cube, you have to multiply the edge 3 times. (a x a x a)

V=a³

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water's quantityX(concentration divided by 100)=amount of salt in the water

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V = 4/3 πr³

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The way to calculate area of a trapezoid

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The way to calculate area of a trapezoid

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(Upper base + lower base) x height ÷ 2

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πr²

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4πr²

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Greater stander deviation=The wider the data spread on a line.

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2 x pi x radius

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S= 2πrh+2πr²

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am * an = a(m+n)

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To solve a volume of a cylinder, you have to multiply 'Radius x Radius' first and  multiply π. Then multiply Height.

V= πr²h

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πr² h/3

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4πr²=πd²

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2 x r(radius) ÷ π = circumference

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Area of Rectangle: area = length x width
Area of Triangle: area = (1/2) (base) (height)
Area of Parallelogram: area = base x height
Area of Circle: π * r²

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Surface area of a Circular Truncated Cone./

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Surface area of a Circular Truncated Cone./

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π[R²+r²+(R+r)l]

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radius x 2 divided by 3.14

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To solve the volume of a rectangular prism, you have to multiply 'Length, Width, and Height' together.

V= whl

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First you choose a side of the box 30 and 20 and multiply together, and 2x because there is two sides. You also do it for the other sides: 30x5x2, 20x5x2. At last plus them all together.
30x20x2=1200
30x5x2=300
20x5x2=200
1200+300+200=1700
The surface area is 1700.

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Stand for an unknown number. Usually x, y, and z.

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Brackets
Exponents
Divisions
or
Multiplication
Addition
or
Subtractions

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Exponentiation is a number that shows how many times to use that number in a multiplication. It is written as a small number to the right and above the base number.
Example, 34  = 3x3x3x3 = 81

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a>b = a is more than b.
a<b = a is less than b.
a=b = a and be is equal.
a≥b = a is same or bigger than b.
a≤b = a is same or smaller than b.

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1. Brackets
2. Orders
3. Divisions
4. Multiplications
5. Addition
6. Subtraction

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x(y+z) = (x*y) + (x*z)

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1:[->2:{->3:(
example:2[x+3{3x(32+6)}]

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a²+b²=c²

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ODD + ODD = EVEN
ODD + EVEN = ODD
EVEN + EVEN = EVEN

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- x - = +
- x + = -
+ x + = +