Question

7. both a and b
answer fast plz!!
correct answer will be marked as brainliest

Answer 1

Answer:

(a); x=35.

(b); x=58.

Step-by-step explanation:

(a).

     Given; angles: 3x+5 , 4x , 2x+5 , x

     we know; the angles sum 360 degrees.

     =) 3x+5+4x+2x+5+x = 360

     =) 10x+10 = 360

     =) 10x = 360-10

     =) 10x = 350

     =) x = 350/10

     =) x = 35.

(b).

    Given; angles: 3x-15 , x , 60 , x+25.

     we know; the angles sum 360 degrees.

     =) 3x-15+x+60+x+25 = 360.

     =) 5x + 70 = 360

     =) 5x = 360 - 70

     =) 5x = 290

     =) x = 290/5

     =) x = 58.