MAth Equation only

Question 1

how to find circumfrence

Answer 1

2 times pi times radius

Question 2

equation for finding the gradient for a line from 2 points

Answer 2

y2-y1
x2-x1

Question 3

Q
formula for finding the area of a kite

Answer 3

A
1/2 times (height) times (length)

Question 4

2
Q
area of a circle

Answer 4

A
pi times radius to the second power

Question 5

Q
how do you find exact center of a line

Answer 5

A
x1+x2. y1+y2
———- ————-
2. 2

Question 7

12
Q
how to find volume of trapaziod

Answer 7

A
((short side+long side)divided by 2) times lenght times height

Question 8

11
Q
how to find area of trapaziod

Answer 8

A
(short side +long side) divided by 2 times height

Question 9

Q
cos equation

Answer 9

A
C a
h

Question 9

7
Q
tan equation

Answer 9

A
T. o
a

Question 10

5
Q
sin equation

Answer 10

S= o
h

Question 11

4
Q
how to find volume of a triangular prizim

Answer 11

A
base times height divided by 2 times lengths

Question 11

3
Q
how to find volume of a cylinder

Answer 11

A
pi times radius to the second power times height

Question 12

Q
when are lines perpindicular(intersecting to make a right angle

Answer 12

A
m1 times m2 = -1

Question 13

Q
how do you find c in the equation for a line

Answer 13

A
first find m then substitute one of the sets of coordinates and solve

Question 14

formula for percentage change

Answer 14

after-before
——————- x 100
before

Question 15

to find an amount as a percentage of the total

Answer 15

ammount
—————- x 100
original

Question 16

2/3
125 how would you simplify the indices step one

Answer 16

1 put the denominator( 3 in this case) on the outside of the square root and put the main number ( 125) under the square root

Question 17

2/3
125 how would you simplify the indices step 2

Answer 17

solve the square root ( in this case, 25)

Question 18

how to solve 25 x(x is exponent) = 5 square root 1
( this is the exponent equation) step one

Answer 18

step one
write the root as an indecie number like this
(1) exponent 1/5

Question 19

how to solve 25 x(x is exponent) = 5 square root 1
( this is the exponent equation) step 2

Answer 19

write both sides as the same base number
(ex. (5 exponent 2) exponent x - (five exponent 0) exponent 1/5

Question 20

how to solve 25 x(x is exponent) = 5 square root 1
( this is the exponent equation) step 3

Answer 20

evaluate the indices (solve)
5 exponent 2x = 5 exponent 0

Question 21

how to solve 25 x(x is exponent) = 5 square root 1
( this is the exponent equation) step 4

Answer 21

take the exponents and solve for the x
example 2x=0
divide both sides by 2
x=0

Question 22

equation for compound interest

Answer 22

A=P(1+r) exponent n

Question 23

What does p stand for in the

Answer 23

principal the starting money you have

Question 24

what does n stand for compound interest equation

Answer 24

number of years

Question 25

what does r stand for in the compound interest equation

Answer 25

the yearly interest equation ( has to be in decimal)

Question 26

how to decrease percentages
example question 12,500 decreased by 20%
step one

Answer 26

do 100- the number you want to use to decrease the original value (in this case 20)

Question 27

how to decrease percentages
example question 12,500 decreased by 20%
step 2

Answer 27

Take your answer from step one, turn it into a decimal, and then do this
12500(example number) times .80 (example number)
and that’s your answer