Answer:
a. the sign is interchange
it should be = x^2 - 3x + 4 - x^3 - 7x + 2
Given:
The equation is
Where, y is the total cost and x is the number of months.
To find:
The y-intercept of the line represented by this equation.
Solution:
We have,

Isolate y variable.

Divide both sides by 0.05.



Putting x=0, we get



Therefore, the y-intercept of the given equation is 25 and the correct option is D.
Answer:
91
Step-by-step explanation:
Rewrite the sides as ratios
s/28=78/24, solve for s
s/28=39/12
s=39/12*28
s=91