Answer:
one solution
Step-by-step explanation:
x + y = 6 so 2x + 2y = 12
That means 3y = 9 so there is only one solution. x also equals 3
Add 509 and 12:
509
+ 12
____
521
509 + 12 = 521
Answer:
Step-by-step explanation:
Area of room = 6×9.5=57m2
Area of room including verandah = 12×8.5=102m2
So area of verandah = 102−57=45m2
So cost of cementing the floor of this verandah = 45×80=3600rupees
Answer:
15° and 100°
Step-by-step explanation:



3 × 5 = 15, 20 × 5 = 100. So the other two angles measure 15° and 100°.