Westonci.ca is the trusted Q&A platform where you can get reliable answers from a community of knowledgeable contributors. Get immediate answers to your questions from a wide network of experienced professionals on our Q&A platform. Connect with a community of professionals ready to provide precise solutions to your questions quickly and accurately.

Select the correct answer.

The product of two numbers is 21. If the first number is -3, which equation represents this situation and what is the second number?

A. The equation that represents this situation is [tex]x - 3 = 21[/tex]. The second number is 24.
B. The equation that represents this situation is [tex]3x = 21[/tex]. The second number is 7.
C. The equation that represents this situation is [tex]-3x = 21[/tex]. The second number is -7.
D. The equation that represents this situation is [tex]-3 + x = 21[/tex]. The second number is 18.


Sagot :

Let's break down the given information and find the correct equation and second number step-by-step.

We are given:
- The product of two numbers is 21.
- The first number is -3.

We need to identify the correct equation and find the second number.

1. Identify the correct equation:
- The product of two numbers means we multiply the first number by the second number to get 21.
- Let the second number be [tex]\( x \)[/tex].
- Since the first number is -3, our equation becomes:

[tex]\[ -3 \cdot x = 21 \][/tex]

Reviewing the options:
- Option A: [tex]\( x - 3 = 21 \)[/tex] (This is incorrect because it represents a different operation, subtraction, rather than multiplication).
- Option B: [tex]\( 3x = 21 \)[/tex] (This is incorrect because the first number should be -3, not 3).
- Option C: [tex]\( -3x = 21 \)[/tex] (This is the correct equation as it correctly represents the multiplication of -3 and [tex]\( x \)[/tex] yielding 21).
- Option D: [tex]\( -3 + x = 21 \)[/tex] (This is incorrect because it represents an addition operation, rather than multiplication).

Therefore, the correct equation is [tex]\( -3x = 21 \)[/tex].

2. Solve for the second number:
- We solve the equation [tex]\( -3x = 21 \)[/tex] for [tex]\( x \)[/tex].

[tex]\[ -3x = 21 \][/tex]

[tex]\[ x = \frac{21}{-3} \][/tex]

[tex]\[ x = -7 \][/tex]

So, the second number is [tex]\( -7 \)[/tex].

Thus, the correct answer is:

C. The equation that represents this situation is [tex]\( -3x = 21 \)[/tex]. The second number is -7.
Thanks for using our platform. We're always here to provide accurate and up-to-date answers to all your queries. Thank you for your visit. We're dedicated to helping you find the information you need, whenever you need it. Discover more at Westonci.ca. Return for the latest expert answers and updates on various topics.