Formulas

Question 1

slope

Answer 1

(y2-y1)/(x2-x1)

Question 2

slope-intercept

Answer 2

y=mx+b

m=slope, b= y-intercept

Question 3

midpoint

Answer 3

(x1+x2/2, y1+y2/2)

Question 4

mean

Answer 4

sum of the terms/ number of terms

Question 5

speed

Answer 5

distance/time

Question 6

Probability of an outcome happening

Answer 6

of desired outcomes/ total number of possible outcomes

Question 7

Number of combinations

Answer 7

Times all the outcomes together
ex) 3 socks, 5 shoes, 6 laces
356=90

Question 8

Rectangle area

Answer 8

length x width

Question 9

perimeter

Answer 9

2L X 2W

Question 10

Rectangular solid area

Answer 10

Length x width x height

Question 11

parallelogram area

Answer 11

1/2bh

Question 12

circle area

Answer 12

πr^2

Question 13

circumference of circle

Answer 13

2πr

Question 14

area of an arc

Answer 14

2πr x (degree measure center of arc/360)

Question 15

equation of a circle

Answer 15

(x-h)^2 + (y-k)^2 = r^2

center point of circle = ( h,k)
r= radius

Question 16

volume of cylinder

Answer 16

πr^2*h

Question 17

distance formula

Answer 17

sq. ( x2-x1)^2 + (y2-y1)^2

Question 18

finding the Nth term

Answer 18

a(nth term) = a1 + (n – 1)d.

a1= first number in sequence, n= what nth term, d= difference one number to the next