1
— l( a+b)
2
It is the area of trapezium
6y^2-7y-3-2y^2+9y+7 (pretend that you're multiplying -1 to 2y^2-9y-7 which is why 9y and 7 are positive now).
Now you're able to simplify your problem, so...
6y^2-2y^2= 4y^2
-7y+9y= 2y
-3+7=4
4y^2+2y+4
Might want to check my math but that's how you do it.
Answer:
I think its A
Step-by-step explanation:
Answer:
It takes 6 men 3 days to lay the foundations of a building of size 30m^2
.
On one site they have to lay the foundations of a building of size 50m2 and it needs to be completed in 2 days.
How many men will they need?
Step-by-step explanation:
