The statement on the bottom left is correct. (6 students studied for 20 to 24 hours)
Answer:
7z^3+6z^2-27z+22
Step-by-step explanation:
The given question is of subtraction:
So,
(7z^3+42z^2-15z+1)- (36z^2+12z-21)
=7z^3+42z^2-15z+1-36z^2-12z+21
Combining alike terms to simplify
=7z^3+42z^2-36z^2-15z-12z+1+21
=7z^3+6z^2-27z+22
So the answer in simplified form is:
7z^3+6z^2-27z+22 ..
Answer:
60
Step-by-step explanation:
Multiply 25 by 32 then add 17:
25 x 32 = 800
800 + 17 = 817
The number is 817
