High School

Select the correct answer.

The product of two integers is [tex]$112$[/tex]. One number is four more than three times the other. Which of the following equations could be used to find one of the numbers?

A. [tex]3x^2 + 4x = 112[/tex]
B. [tex]3x^2 + 4 = 112[/tex]
C. [tex]4x^2 + 3x = 112[/tex]
D. [tex]4x^2 + 3 = 112[/tex]

Answer :

Sure, let's solve this step-by-step!

We are given two pieces of information about the integers:
1. The product of the two integers is 112.
2. One number is four more than three times the other.

Let's set up our variables:
- Let [tex]\( x \)[/tex] be one of the integers.
- Let [tex]\( y \)[/tex] be the other integer.

From the problem statement, we know:
[tex]\[ x \cdot y = 112 \][/tex]

We also know that one number is four more than three times the other:
[tex]\[ y = 3x + 4 \][/tex]

Now, we can substitute [tex]\( y \)[/tex] in the first equation using the expression we have for [tex]\( y \)[/tex]:
[tex]\[ x \cdot (3x + 4) = 112 \][/tex]

Expanding and simplifying, we get:
[tex]\[ 3x^2 + 4x = 112 \][/tex]

This is the equation we can use to find one of the numbers.

So the correct answer is:
[tex]\[ \text{A. } 3x^2 + 4x = 112 \][/tex]