Answered

Find the best answers to your questions at Westonci.ca, where experts and enthusiasts provide accurate, reliable information. Ask your questions and receive accurate answers from professionals with extensive experience in various fields on our platform. Discover in-depth answers to your questions from a wide network of professionals on our user-friendly Q&A platform.

Suppose z varies jointly with x and y. If z = 42 when x = 3 and y = 7, then what is z when x = 7 and y = 8?
Do not include "z =" in your answer.

Sagot :

adioabiola

Since z varies jointly as x and y, the value of z when x = 7 and y= 8 is; 112

According to the question, z varies jointly with X and y.

  • In essence, the relationship between z, x and y can be written as;

z = kxy

  • where k= constant of proportionality.

We therefore need to find k first, from the first set of values of z, ,x and y.

Then;

  • 42 = k × 3 × 7

  • k = 42/21

  • k = 2.

Consequently, the value of z when x = 7 and y = 8 is as follows;

  • z = 2 × 7 × 8.

z = 112.

Read more;

https://brainly.com/question/11694798

We hope our answers were useful. Return anytime for more information and answers to any other questions you have. We appreciate your visit. Our platform is always here to offer accurate and reliable answers. Return anytime. Your questions are important to us at Westonci.ca. Visit again for expert answers and reliable information.