Answer:
24x^2
Step-by-step explanation:
When expanded (x+2)^4= x^4+8x^3+24x^2+32x+16
The only term that matches with these is 24x^2
You have to write two equation:
'substract 22 from a number'

and:
'the result is doubled, the answer is 6 more than the original number'

then you change 'Y' in 2nd equation for left side of 1st equation:

count it and you get:

This means that X=50
The original number is 50.
Answer:144
Step-by-step explanation: I explained what to do in the comments.
Answer:
2 weeks
Step-by-step explanation:
the tree that grows two inches, in 2 weeks it would be 12 inches and the tree that grows three in 2 weeks it would also be 12 inches