The y-intercept of the equation is the value of the variable y or in this case, f(x), when x is equated to zero. Out of all the choices presented in this item, if x is equated to zero, the first two terms will be equal to zero, leaving the third term only for the numerical value of f(x).
From the choices presented, the answer would be f(x) = -x2 + 2x + 4. Thus, the answer is the third choice, C.
The coefficient of the term with the power of 2: 4y+3y^2 + y + 2 is equal to 3
<u>Solution:</u>
Given, expression is 
It can be simplified and written as 
We have to find the coefficient of the term with the power of 2.
Now, we know that, coefficient is factor by which the term is being multiplied with.
So, now, let us find the term with power 2 and then we can find by which factor it is being multiplied.
If we observe,
is the term with power 2.
And, it is being multiplied by 3.
Hence, the coefficient of term with power 2 is 3.
Here's the work:
Density = mass/volume = 129g/(5*3*2) cm^3 = 4.3 g/cm^3.