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  2. Order of operations - Wikipedia

    en.wikipedia.org/wiki/Order_of_operations

    [6] [7] [a] The parentheses can be omitted if the input is a single numerical variable or constant, [2] as in the case of sin x = sin(x) and sin π = sin(π). [a] Traditionally this convention extends to monomials; thus, sin 3x = sin(3x) and even sin ⁠ 1 / 2 ⁠ xy = sin(xy/2), but sin x + y = sin(x) + y, because x + y is not a monomial ...

  3. Mathematics education in the United States - Wikipedia

    en.wikipedia.org/wiki/Mathematics_education_in...

    A typical sequence of secondary-school (grades 6 to 12) courses in mathematics reads: Pre-Algebra (7th or 8th grade), Algebra I, Geometry, Algebra II, Pre-calculus, and Calculus or Statistics. However, some students enroll in integrated programs [3] while many complete high school without passing Calculus or Statistics.

  4. List of primary education systems by country - Wikipedia

    en.wikipedia.org/wiki/List_of_primary_education...

    1st grade: 6 to 7 years old; 2nd grade: 7 to 8 years old; 3rd grade: 8 to 9 years old; 4th grade: 9 to 10 years old; 5th grade: 10 to 11 years old; 6th grade: 11 to 12 years old; 7th grade: 12 to 13 years old; 8th grade: 13 to 14 years old; 9th grade: 14 to 15 years old

  5. 10 Hard Math Problems That Even the Smartest People in the ...

    www.aol.com/10-hard-math-problems-even-150000090...

    Since you've known these numbers since grade school, stating the conjectures is easy. When two primes have a difference of 2, they’re called twin primes. So 11 and 13 are twin primes, as are 599 ...

  6. FOIL method - Wikipedia

    en.wikipedia.org/wiki/FOIL_method

    The FOIL method is a special case of a more general method for multiplying algebraic expressions using the distributive law.The word FOIL was originally intended solely as a mnemonic for high-school students learning algebra.

  7. List of undecidable problems - Wikipedia

    en.wikipedia.org/wiki/List_of_undecidable_problems

    For functions in certain classes, the problem of determining: whether two functions are equal, known as the zero-equivalence problem (see Richardson's theorem); [4] the zeroes of a function; whether the indefinite integral of a function is also in the class. [5] Of course, some subclasses of these problems are decidable.

  8. Millions hurt by credit repair firms to share $1.8 billion in ...

    www.aol.com/millions-hurt-credit-repair-1...

    More than 4 million Americans gouged by credit repair companies including Lexington Law and CreditRepair.com will soon collectively receive $1.8 billion in refund checks, the Consumer Financial ...

  9. Mexico and US reach agreement to address Mexico's habit of ...

    www.aol.com/mexico-us-reach-agreement-address...

    Mexico has long used that wait-and-hope strategy, but it has led to problems in the past, both at home and in the U.S. Mexico is obliged to deliver 350,000 acre-feet of water per year, or about 1. ...

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