chapt 1.4 & 1.5 & 1.6 - speed , number pattern , algebra Flashcards
1
Q
speed formula
A
speed = dist/time
avg speed = total dist/total time
2
Q
nth term
A
a + d(n-1)
; a = 1st term
d = difference
3
Q
expansion
A
1) (a + b)² = a² + 2ab + b²
2) (a - b)² = a² - 2ab + b²
3) (a + b)(a - b) = a² - b²
4
Q
quadratic formula
A
x = [-b +- root b² - 4ac] / 2a
