When you want to write a polynomial, you should write the term with the highest degree first.
Here, it should go like this: d^3 + d^2 - d + 3
This means that the term which should be written first is the cubic term.
1/2 ÷ -3/7 = -7/6 The answer is -7/6
This gives you, 4x + 5y = -25 as your final answer.
To find the slope between the points, you would go through this process
(-1-6)/(4-0)
And we get
(-7)/4
Aka
-(7/4) which is our slope
I got B for 3
Because
3x<-2x+15
5x<15
X<3