/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q. 227 In the following exercise, solve... [FREE SOLUTION] | 91影视

91影视

Find study content
Learning Materials

Discover learning materials by subject, university or textbook.

Explanations

Textbooks
All Subjects

Anthropology

Archaeology

Architecture

Art and Design

Bengali

Biology

Business Studies

Greek

Chemistry

Chinese

Combined Science

Computer Science

Economics

Engineering

English

English Literature

Environmental Science

French

Geography

German

History

Hospitality and Tourism

Human Geography

Italian

Japanese

Law

Macroeconomics

Marketing

Math

Media Studies

Medicine

Microeconomics

Music

Nursing

Nutrition and Food Science

Physics

Polish

Politics

Psychology

Religious Studies

Sociology

Spanish

Sports Sciences

Translation

All Subjects

Biology

Business Studies

Chemistry

Combined Science

Computer Science

Economics

English

Environmental Science

Geography

History

Math

Physics

Psychology

Sociology
Features
Features

Discover all of these amazing features with a free account.

Flashcards

91影视 AI

Notes

Study Plans

Study Sets
What鈥檚 new?

Flashcards
Study your flashcards with three learning modes.

Study Sets
All of your learning materials stored in one place.

Notes
Create and edit notes or documents.

Study Plans
Organise your studies and prepare for exams.
91影视
Discover

All the hacks around your studies and career - in one place.

Find a degree

Magazine
Featured

Magazine
Trusted advice for anyone who wants to ace their studies & career.

The largest student job board with the most exciting opportunities.

Verified student deals from top brands.

Discover our mobile app to take your studies anywhere.

Learning Materials

Features

Discover

Intermediate Algebra

OPENSTAX

$Math Studyset 91影视 Explanations$ Math

OER 2017 Edition 路 1346 pages

ISBN: 9780998625720

Chapter 11: Q. 227 (page 1148)

In the following exercise, solve the system of equations by using elimination.
$\{\begin{cases} 2 x^{2} + y^{2} = 11 \\ x^{2} + 3 y^{2} = 28 \end{cases}$

Short Answer

Expert verified

$(1, 3), (1, - 3), (- 1, 3), (- 1, - 3)$

Step by step solution

01

Step 1. Given information.

In this case, the following system of equations are given:

$\{\begin{cases} 2 x^{2} + y^{2} = 11 \\ x^{2} + 3 y^{2} = 28 \end{cases}$

02

Step 2. Solution by elimination.

Since both the equations are in the standard form, to eliminate $x^{2}$ , multiply both sides of the second equation by 2 and then subtract from the first equation:

$2 x^{2} + y^{2} - 2 x^{2} - 6 y^{2} = 11 - 56 - 5 y^{2} = - 45 y^{2} = \frac{- 45}{- 5} = 9 y = 卤 \sqrt{9} y = 卤 3$

Substitute the values of $y$ in the first equation:

When $y = 3$ :

$2 x^{2} + {(3)}^{2} = 11 2 x^{2} = 11 - 9 x^{2} = 1 x = 卤 1$

When $y = - 3$ :

$2 x^{2} + {(- 3)}^{2} = 11 2 x^{2} = 11 - 9 x^{2} = 1 x = 卤 1$

Expressing the solutions as ordered pairs:

$(1, 3), (1, - 3), (- 1, 3), (- 1, - 3)$

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Simplify the complex rational expression by writing it as division:

$\frac{\frac{1}{a} + \frac{1}{b}}{\frac{1}{a^{2}} - \frac{1}{b^{2}}}$

Simplify each expression:

$鈸� {(2 w x)}^{5} 鈸� {(鈭� 11 p q^{3})}^{0} 鈸� {(2 b^{3})}^{鈭� 4} 鈸� {(8 a^{鈭� 4})}^{2}$

In the following exercises,simplify

$(a) \frac{r^{\frac{5}{2}} . r^{- \frac{1}{2}}}{r^{- \frac{3}{2}}} (b) (\frac{36 s^{\frac{1}{5}} t^{- \frac{3}{2}}}{s^{- \frac{9}{5}} . t^{\frac{1}{2}}})$

In the following exercises, factor the greatest common factor from each polynomial.

$- 6 a^{3} b - 12 a^{2} b^{2} + 18 a b^{2}$

In the following exercises, simplify each expression using the properties for exponents.

$鈸� q^{27} 路 q^{15} 鈸� 5^{x} 路 5^{4 x} 鈸� 9 u^{41} 路 7 u^{53} 鈸� c^{5} 路 c^{11} 路 c^{2}$

See all solutions

Recommended explanations on Math Textbooks

Probability and Statistics

Read Explanation

Logic and Functions

Read Explanation

Statistics

Read Explanation

Mechanics Maths

Read Explanation

Calculus

Read Explanation

Applied Mathematics

Read Explanation

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.