College

Which equation can be solved by using this system of equations?

[tex]\[

\begin{cases}

y = 3x^3 - 7x^2 + 5 \\

y = 7x^4 + 2x

\end{cases}

\][/tex]

A. [tex]\(3x^3 - 7x^2 + 5 = 0\)[/tex]

B. [tex]\(3x^3 - 7x^2 + 5 = 7x^4 + 2x\)[/tex]

C. [tex]\(7x^4 + 2x = 0\)[/tex]

D. [tex]\(7x^4 + 3x^3 - 7x^2 + 2x + 5 = 0\)[/tex]

Answer :

To determine which equation from the provided list can be solved using the given system of equations, let's analyze the system of equations:

1. [tex]\( y = 3x^3 - 7x^2 + 5 \)[/tex]
2. [tex]\( y = 7x^4 + 2x \)[/tex]

The idea is to find a single equation that relates these two expressions. This can be done by setting the expressions for [tex]\( y \)[/tex] equal to each other because both expressions represent [tex]\( y \)[/tex].

So, equate both equations:

[tex]\[ 3x^3 - 7x^2 + 5 = 7x^4 + 2x \][/tex]

Now let's match this equation with the given options:

1. [tex]\( 3x^3 - 7x^2 + 5 = 0 \)[/tex]
2. [tex]\( 3x^3 - 7x^2 + 5 = 7x^4 + 2x \)[/tex]
3. [tex]\( 7x^4 + 2x = 0 \)[/tex]
4. [tex]\( 7x^4 + 3x^3 - 7x^2 + 2x + 5 = 0 \)[/tex]

From this analysis, the correct equation derived from our system of equations is:

[tex]\[ 3x^3 - 7x^2 + 5 = 7x^4 + 2x \][/tex]

So, the equation from the options that can be solved using the given system of equations is:

[tex]\[ 3x^3 - 7x^2 + 5 = 7x^4 + 2x \][/tex]