The sources said that a deal of unknown value could be announced as early as this week. (fortune.com)
Students will be required to use all the trig functions and some inverses to find unknown values. (tes.com)
According to the National Council of Teachers of Mathematics, middle school typically begins with concepts such as fractions and decimals, leading to pre-algebra ideas like manipulating variables and solving equations for unknown values. (hellothinkster.com)