{"id":297,"date":"2023-06-21T13:22:53","date_gmt":"2023-06-21T13:22:53","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/chapter\/why-it-matters-systems-of-equations-and-inequalities\/"},"modified":"2024-01-09T16:21:11","modified_gmt":"2024-01-09T16:21:11","slug":"why-it-matters-systems-of-equations-and-inequalities","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/chapter\/why-it-matters-systems-of-equations-and-inequalities\/","title":{"raw":"Chapter 6. Systems of Equations","rendered":"Chapter 6. Systems of Equations"},"content":{"raw":"After years of saving, you have finally done it\u2014you rented a space to open your very own coffee shop. \u00a0You\u2019ve already painted the walls and set up the furniture. \u00a0The next step is to plan your menu. \u00a0In considering both taste and cost, you have developed a coffee flavor that is sure to bring customers coming back for more.\r\n\r\n<img class=\" wp-image-3744 aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/896\/2017\/03\/17191459\/cafe-2081857_1920-300x225.jpg\" alt=\"Photo shows the interior of a coffee shop with a counter in the background, and tables and chairs in the forefront.\" width=\"496\" height=\"372\" \/>\r\n\r\n&nbsp;\r\n\r\nThis soon-to-be signature flavor is made from a mixture of coffee beans. \u00a0The first type of coffee bean sells for $8 per pound and the other sells for $14 per pound.\r\n\r\nYou will combine the coffee beans in batches of 100 pounds, and sell them for $9.80 per pound. \u00a0Now all you need to figure out is how much of each type of coffee bean should you mix together. \u00a0You can use an equation to relate the amount of each type of coffee bean. \u00a0If you set the number of pounds of the first coffee bean equal to [latex]x[\/latex] and the number of pounds of the first coffee bean equal to [latex]y[\/latex], you know that the total is 100.\r\n<p style=\"text-align: center;\">[latex]x+y=100[\/latex]<\/p>\r\nYou can also relate the cost of each type of bean to the cost of the mixture. \u00a0The cost of the first type of coffee bean is the number of pounds times the cost per pound, [latex]8x[\/latex]. \u00a0Similarly, cost of the second type of coffee bean is the number of pounds times its cost per pound, [latex]14x[\/latex]. \u00a0And the total cost is $980 for 100 pounds.\r\n<p style=\"text-align: center;\">[latex]8x+14y=980[\/latex]<\/p>\r\nNow you have two equations, but what can you do to solve for the values of [latex]x[\/latex] and [latex]y[\/latex]? \u00a0\u00a0And what information do those values give you?\r\n\r\nTo find the answers to these and other questions, read on in this module. \u00a0There you will learn about combinations of equations, called systems of equations, along with different methods of solving them.","rendered":"<p>After years of saving, you have finally done it\u2014you rented a space to open your very own coffee shop. \u00a0You\u2019ve already painted the walls and set up the furniture. \u00a0The next step is to plan your menu. \u00a0In considering both taste and cost, you have developed a coffee flavor that is sure to bring customers coming back for more.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-3744 aligncenter\" src=\"https:\/\/s3-us-west-2.amazonaws.com\/courses-images\/wp-content\/uploads\/sites\/896\/2017\/03\/17191459\/cafe-2081857_1920-300x225.jpg\" alt=\"Photo shows the interior of a coffee shop with a counter in the background, and tables and chairs in the forefront.\" width=\"496\" height=\"372\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>This soon-to-be signature flavor is made from a mixture of coffee beans. \u00a0The first type of coffee bean sells for $8 per pound and the other sells for $14 per pound.<\/p>\n<p>You will combine the coffee beans in batches of 100 pounds, and sell them for $9.80 per pound. \u00a0Now all you need to figure out is how much of each type of coffee bean should you mix together. \u00a0You can use an equation to relate the amount of each type of coffee bean. \u00a0If you set the number of pounds of the first coffee bean equal to [latex]x[\/latex] and the number of pounds of the first coffee bean equal to [latex]y[\/latex], you know that the total is 100.<\/p>\n<p style=\"text-align: center;\">[latex]x+y=100[\/latex]<\/p>\n<p>You can also relate the cost of each type of bean to the cost of the mixture. \u00a0The cost of the first type of coffee bean is the number of pounds times the cost per pound, [latex]8x[\/latex]. \u00a0Similarly, cost of the second type of coffee bean is the number of pounds times its cost per pound, [latex]14x[\/latex]. \u00a0And the total cost is $980 for 100 pounds.<\/p>\n<p style=\"text-align: center;\">[latex]8x+14y=980[\/latex]<\/p>\n<p>Now you have two equations, but what can you do to solve for the values of [latex]x[\/latex] and [latex]y[\/latex]? \u00a0\u00a0And what information do those values give you?<\/p>\n<p>To find the answers to these and other questions, read on in this module. \u00a0There you will learn about combinations of equations, called systems of equations, along with different methods of solving them.<\/p>\n\n\t\t\t <section class=\"citations-section\" role=\"contentinfo\">\n\t\t\t <h3>Candela Citations<\/h3>\n\t\t\t\t\t <div>\n\t\t\t\t\t\t <div id=\"citation-list-297\">\n\t\t\t\t\t\t\t <div class=\"licensing\"><div class=\"license-attribution-dropdown-subheading\">CC licensed content, Original<\/div><ul class=\"citation-list\"><li>Why It Matters: Systems of Equations and Inequalities. <strong>Authored by<\/strong>: Lumen Learning. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><\/ul><div class=\"license-attribution-dropdown-subheading\">CC licensed content, Shared previously<\/div><ul class=\"citation-list\"><li>Cafe. <strong>Authored by<\/strong>: inyoung. <strong>Located at<\/strong>: <a target=\"_blank\" href=\"https:\/\/pixabay.com\/en\/cafe-coffee-jebudo-the-coffee-shop-2081857\">https:\/\/pixabay.com\/en\/cafe-coffee-jebudo-the-coffee-shop-2081857<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">CC BY: Attribution<\/a><\/em><\/li><\/ul><\/div>\n\t\t\t\t\t\t <\/div>\n\t\t\t\t\t <\/div>\n\t\t\t <\/section>","protected":false},"author":395986,"menu_order":1,"template":"","meta":{"_candela_citation":"[{\"type\":\"original\",\"description\":\"Why It Matters: Systems of Equations and Inequalities\",\"author\":\"Lumen Learning\",\"organization\":\"\",\"url\":\"\",\"project\":\"\",\"license\":\"cc-by\",\"license_terms\":\"\"},{\"type\":\"cc\",\"description\":\"Cafe\",\"author\":\"inyoung\",\"organization\":\"\",\"url\":\"https:\/\/pixabay.com\/en\/cafe-coffee-jebudo-the-coffee-shop-2081857\",\"project\":\"\",\"license\":\"cc-by\",\"license_terms\":\"\"}]","CANDELA_OUTCOMES_GUID":"8067f1e9-5814-452b-a53d-995bcc1022a9","pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-297","chapter","type-chapter","status-publish","hentry"],"part":323,"_links":{"self":[{"href":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/wp-json\/pressbooks\/v2\/chapters\/297","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/wp-json\/wp\/v2\/users\/395986"}],"version-history":[{"count":5,"href":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/wp-json\/pressbooks\/v2\/chapters\/297\/revisions"}],"predecessor-version":[{"id":1538,"href":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/wp-json\/pressbooks\/v2\/chapters\/297\/revisions\/1538"}],"part":[{"href":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/wp-json\/pressbooks\/v2\/parts\/323"}],"metadata":[{"href":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/wp-json\/pressbooks\/v2\/chapters\/297\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/wp-json\/wp\/v2\/media?parent=297"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/wp-json\/pressbooks\/v2\/chapter-type?post=297"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/wp-json\/wp\/v2\/contributor?post=297"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/gsu-collegealgebra\/wp-json\/wp\/v2\/license?post=297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}