Answer:
I think that's right. I checked my answer and proved it on that sheet.
Answer:
We can use the distributive property.
(x + 2)(y - 1)
= x(y) - x(1) + 2(y) - 2(1)
= xy - x + 2y - 2
The answer is 60% but you can make it higher if your teacher let's you correct it.
30 100
x 70
x= (30*70)/100=21