Standards in this domain:
- Rei Miyamoto (宮本麗, Miyamoto Rei) is a second year student of Fujimi Academy, and a classmate and childhood friend of Takashi Komuro since kindergarten. She is also a protagonist of the story, next to Takashi Komuro and Saeko Busujima. Rei is a member of the Sojutsu club, and her combat skills have proven to be a strong asset to the group. She fights with a spear made from a broomstick.
- Top-brand gear, clothing—and outdoor adventures! Plus rentals, classes, events, expert advice and more. Visit REI Co-op online and in-store.
- Looking for online definition of REI or what REI stands for? REI is listed in the World's largest and most authoritative dictionary database of abbreviations and acronyms The Free Dictionary.
Understand solving equations as a process of reasoning and explain the reasoning.
CCSS.Math.Content.HSA.REI.A.1
Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method.
Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method.
CCSS.Math.Content.HSA.REI.A.2
Solve simple rational and radical equations in one variable, and give examples showing how extraneous solutions may arise.
Solve simple rational and radical equations in one variable, and give examples showing how extraneous solutions may arise.
Solve equations and inequalities in one variable.
CCSS.Math.Content.HSA.REI.B.3
Solve linear equations and inequalities in one variable, including equations with coefficients represented by letters.
Solve linear equations and inequalities in one variable, including equations with coefficients represented by letters.
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CCSS.Math.Content.HSA.REI.B.4
Solve quadratic equations in one variable.
Solve quadratic equations in one variable.
Reign
CCSS.Math.Content.HSA.REI.B.4.a
Use the method of completing the square to transform any quadratic equation in x into an equation of the form (x - p)2 = q that has the same solutions. Derive the quadratic formula from this form.
Use the method of completing the square to transform any quadratic equation in x into an equation of the form (x - p)2 = q that has the same solutions. Derive the quadratic formula from this form.
CCSS.Math.Content.HSA.REI.B.4.b
Solve quadratic equations by inspection (e.g., for x2 = 49), taking square roots, completing the square, the quadratic formula and factoring, as appropriate to the initial form of the equation. Recognize when the quadratic formula gives complex solutions and write them as a ± bi for real numbers a and b.
Solve quadratic equations by inspection (e.g., for x2 = 49), taking square roots, completing the square, the quadratic formula and factoring, as appropriate to the initial form of the equation. Recognize when the quadratic formula gives complex solutions and write them as a ± bi for real numbers a and b.
Solve systems of equations.
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CCSS.Math.Content.HSA.REI.C.5
Prove that, given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solutions.
Prove that, given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solutions.
CCSS.Math.Content.HSA.REI.C.6
Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.
Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.
CCSS.Math.Content.HSA.REI.C.7
Solve a simple system consisting of a linear equation and a quadratic equation in two variables algebraically and graphically. For example, find the points of intersection between the line y = -3x and the circle x2 + y2 = 3.
Solve a simple system consisting of a linear equation and a quadratic equation in two variables algebraically and graphically. For example, find the points of intersection between the line y = -3x and the circle x2 + y2 = 3.
CCSS.Math.Content.HSA.REI.C.8
(+) Represent a system of linear equations as a single matrix equation in a vector variable.
(+) Represent a system of linear equations as a single matrix equation in a vector variable.
CCSS.Math.Content.HSA.REI.C.9
(+) Find the inverse of a matrix if it exists and use it to solve systems of linear equations (using technology for matrices of dimension 3 × 3 or greater).
(+) Find the inverse of a matrix if it exists and use it to solve systems of linear equations (using technology for matrices of dimension 3 × 3 or greater).
Represent and solve equations and inequalities graphically.
CCSS.Math.Content.HSA.REI.D.10
Understand that the graph of an equation in two variables is the set of all its solutions plotted in the coordinate plane, often forming a curve (which could be a line).
Understand that the graph of an equation in two variables is the set of all its solutions plotted in the coordinate plane, often forming a curve (which could be a line).
CCSS.Math.Content.HSA.REI.D.11
Explain why the x-coordinates of the points where the graphs of the equations y = f(x) and y = g(x) intersect are the solutions of the equation f(x) = g(x); find the solutions approximately, e.g., using technology to graph the functions, make tables of values, or find successive approximations. Include cases where f(x) and/or g(x) are linear, polynomial, rational, absolute value, exponential, and logarithmic functions.*
Explain why the x-coordinates of the points where the graphs of the equations y = f(x) and y = g(x) intersect are the solutions of the equation f(x) = g(x); find the solutions approximately, e.g., using technology to graph the functions, make tables of values, or find successive approximations. Include cases where f(x) and/or g(x) are linear, polynomial, rational, absolute value, exponential, and logarithmic functions.*
CCSS.Math.Content.HSA.REI.D.12
Graph the solutions to a linear inequality in two variables as a half-plane (excluding the boundary in the case of a strict inequality), and graph the solution set to a system of linear inequalities in two variables as the intersection of the corresponding half-planes.
Graph the solutions to a linear inequality in two variables as a half-plane (excluding the boundary in the case of a strict inequality), and graph the solution set to a system of linear inequalities in two variables as the intersection of the corresponding half-planes.
2 5% back applies to REI net purchases including full price and discount items, REI gift cards, services, fees and REI adventure travel-invoiced trip payments. 2% back applies to net purchases using a mobile wallet. Mobile wallet is defined as the method of paying for a transaction by use of a mobile device (in-store, in-app or online) and using eligible mobile wallet providers. 1% back applies to non-REI and non-mobile wallet net purchases only. Net purchases are purchases minus credits and returns. Non-Purchase transactions, including cash advances, convenience checks, balance transfers, and other advance transactions as defined in the Cardmember Agreement, as well as interest charges and fees, do not qualify. Go to reimastercard.com/benefits for additional information. If the transaction is a Qualified REI Purchase made using an eligible mobile wallet provider, the reward will be 5% back. If the transaction is a Qualified Non-REI Purchase made using an eligible mobile wallet provider, the reward will be 2% back. The 5%, 2% and 1% rewards are distributed with your member dividend annually.