Given f(x) = -15x - 13, find x when f(x) = -28.

x=-1

Step-by-step explanation:

given f(x)=-15x-13

       f(x)=-28 put in given equation

      f(x)=-15x-13

   -28=15x-13

    15x=-15

      x=-1

Step-by-step explanation:

The odds for an event is basically the ratio of the favorable outcomes to the unfavorable outcomes.

Given : The odds of choosing one black ball from an urn are 7 to 13.

i.e. favorable outcomes for getting black ball = 7

i.e.  unfavorable outcomes for getting black ball = 13

Now , Total outcomes = favorable outcomes+  unfavorable outcomes

=7+13=20

Then, the probability of getting a black ball

Hence, the required probability