reduce the negations for all of the following:
3) ~ (a < --> b)
4) (~a & ~b) & (~c v ~d)
5) a --> (b v ~c)
6) [a --> (b --> ~c)] --> [(~d --> ~e) --> f]
7) ~a v ~b
8) ~(a v b)
9) [~~a v (~b & c)] v (~~d --> ~~~e)
10) ~(a < --> b)

the f

last graph i believe

step-by-step explanation:

worked it out i believe

5x + 3y = - 4

step-by-step explanation:

the equation of a line in standard form is

ax + by = c ( a is a positive integer and b, c are integers )

express the line first of all in slope- intercept form

y = mx + c ( m is the slope and c the y-intercept )

to calculate m use the gradient formula

m = ( y₂ - y₁ ) / ( x₂ - x₁ )

with (x₁, y₁ ) = (7, - 3) and (x₂, y₂ ) = (4, - 8)

m = = -

y = - x + c ← is the partial equation

to find c substitute either of the 2 points into the partial equation

using (4, - 8 ), then

- 8 = - + c ⇒ c = -

y = - x - ← in slope-intercept form

multiply all terms by 3 to eliminate the fractions

3y = - 5x - 4 ( add 5x to both sides )

5x + 3y = - 4 ← in standard form

6x = 48

i hope this . 6 cards each and a total of $48. dvide each side by 6 and you will have your answer.