Answered

Find the best answers to your questions at Westonci.ca, where experts and enthusiasts provide accurate, reliable information. Our platform connects you with professionals ready to provide precise answers to all your questions in various areas of expertise. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our 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

Thanks for using our service. We aim to provide the most accurate answers for all your queries. Visit us again for more insights. We hope you found this helpful. Feel free to come back anytime for more accurate answers and updated information. Thank you for using Westonci.ca. Come back for more in-depth answers to all your queries.