Question

Very easy maths question​

Answer 1

Step-by-step explanation:

since AOB are colinear hence it makes 180°

So,

=> (x-10)°+ (4x-25)° +(2x+5)° = 180°

=> 7x - 30 = 180

=> 7x = 180+30

=> 7x = 210

=> x = 210/7

=> x = 30

thus BOC = 2x+5 = 2×30+5 = 65°

Q11)

a) 7kg + 0.070kg = 7.070 kg

b) 0.5/0.25

= (5×100)/(25×10)

= 500/250

= 2

c) (4.2+3.8+7.6)÷3

= (15.6)/3

= 5.2 ans