Can someone please explain to me HOW and the answers please?

hii

Step-by-step explanation:

see below

Step-by-step explanation:

1).  58 + 47 + x = 180

2).  21 + 96 + x = 180

3).  3x-1 + 90 + 31 = 180

4).  34 + 21 + 180 - x = 180

5).  180 - 100 + 2x + 3 + 51 = 180

6).  180 - 94 + 60 + 2x = 180

7).  52 + 43 + x = 180

8).  x + 2x + 3x = 180

9).  90 + 2x-2 + x+5 = 180

10).  23 + 10 + x = 180

11).  x + x + x = 180

12).  x + 40 + 3x - 17 + 2x - 5 = 180

     6x = 162

25/4

step-by-step explanation:

call segment cd's length x. because dc and ab are parallel, angle acd and cab, so triangles adc and abc are similar and we can set up the equation x / ac = ac / ab, or x / 5 = 5 / 4 and x = 25/4.

days of the week

step-by-step explanation:

javier earned more money then kyle, so that won't always be a constant term, but the days of the week do not change so that term is always constant.

edit: i meant