I wrote it out on paper and uploaded the answer for you. Let me know if you have any questions.
The gravity is 1.5m\s^2
Further explanation:
The weight of any object is given by the product of mass and gravity of the object
Let
m denote the mass of object
g be the gravity
and
w be the weight
Then the statement can be mathematically written as:

Given
m=300kg
w=450N
Putting the values of m and w into the formula

The gravity is 1.5m\s^2
Keywords: Mass, Gravity
Learn more about gravity at:
#LearnwithBrainly
You answered correctly for part a. just simplify it. so for part a it would be x^4 + 8x^3 + 24x^2 + 32x + 16. repeat what you did in part a with part b (add & simplify). btw, the missing side in part c is 2x-x = x