Which equation could be used to find the value of x in the triangle below? 4x + 10
6x - 10
А
12x + 20 = 180
B
12x = 180
С
12x - 20 = 180
D
8x - 10 = 4x + 10

B

Step-by-step explanation:

4x+10+6x-10+2x=180°

4x+6x+2x=180°+10-10

12x/12=180°12

x=15° check :

4x+10+6x-10+2x=180° then x=15°

4*15+10+6*15-10+2*15=180°

60+10+90-10+30=180°

180°=180°

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

0.85 or 85%

step-by-step explanation:

1) divide 23 by 27

2) round the decimal to the nearest 10

3) so your answer would be 0.85 or 85%