Math Flashcards
Math
How to add integers
If both the numbers are of the same sign, then add the values. Attach the common sign with the answer.
If they have different signs, then subtract them and find the difference between the absolute values.
ex=-9+10=1
How to subtract integers
Rewrite problem to add oposite then follow rules for adding integers
ex=-9 - 2= - 11, 9 - -4= 13
what is formula for volume of a cone
V=πr^h/3
whta is formula for volume of a cylnder
is base πr2 then times h.
what is the formula for pythatgorem theorem
a^2+B^2=c^2 then √
percent change describes the change overtime either increase or decrease. how is it represented
new- orginial
%/100
k/-3 - 2<8
first you add 2+8=10 then since you do the opposite you multply 10 *3=30
30
radius of penny is 9.5. find area of coin
n9.5^2= 283.385
how to find percent change
To find the percent change, you first subtract the earlier index value from the later one, then divide that difference by the earlier index value, and finally multiply the result by 100.
a bicycle has a wheel dimeater of 20. what is circumfrence
forumala 2n10=62.8
formula for triangle
lateral area and ttl surface area
lateral= (a+b+c)h
h= height that connects two sides
total surface area= PH+2b
cylnder
For a cylinder there is 2 kinds of formulas the lateral and the total. the lateral surface area is just the sides the formula for that is 2(pi)radius(height). the formula for the total surface area is 2(pi)radius(height) + 2(pi)radius squared.
lateral s area for rectangular prism
The lateral surface area of any right rectangular prism is equivalent to the perimeter of the base times the height of the prism. Therefore, the lateral surface area (LSA) of a rectangular prism = 2 ( l + w ) h square units.
total surface area for rectangular prism
The surface area of a rectangular prism = 2 (lw+lh+hw) square units.
formula for cone volume
πr^2h
/3
