is algebra 2/trigonometry hard?

VERY HARD!!!

Algebra uses variables. A variable is an unknown numerical value. Many times a variable can be calculated by balancing the equation. A + 5 = 15. An equation is balanced, so what is done to one side of the equal sign is also done to the other side of the equal sign. Subtract 5 from both sides of the equation. Now the equation states A =10. Restate the equation and use the numerical value in place of the variable. 10 + 5 = 15.

EPEMDAS is the Order Of Operations. This describes the order in which terms are solved so that an equation flows correctly. E...exponents modifying parenthesis. P...parenthetical expressions. E...exponents within parenthesis. M...multiplication. D...division. A...addition. S...subtraction. 5( 3a + a)^2 = 20. 5( 3a^2 + a^2) = 20. 5(4a^2) = 20. 20a^2 = 20. a = 1. 20(1 x 1) = 20. 20(1) = 20. 20 = 20.

Fractions are numbers expressed in terms of parts of a whole. The top number is the numerator. The bottom number is the denominator. 4/5 is a fraction. 4 is the numerator. 5 is the denominator. Percentages are fractions with a denominator of 100, such as 50/100 - which is fifty percent, or one half. Common factors are used to simplify fractions. 50 is the common factor in 50/100. Use the common factor to divide both the numerator and denominator in order to simplify a fraction. 50 divided by 50 equals 1. 100 divided by 50 equals 2. Now restate the fraction in the simplified form. 50/100 = 1/2. 1/2 is the simplified fraction. is/of = x/100. This formula is used to find matching terms for fractions. 1/2 = x/100. The numerator of the first fraction multlied across with the denominator of the second fraction. The denominator of the first fraction mu.tip.ies across with the numerator of the second fraction. 100 = 2x. The equation is simplified. Divide both sides of the equation by 2. 50 = x. Restate the equation in simplified form. 1/2 = 50/100.

Fractions also combine, but only factions with matching denominators can add together. A common denominator must be found to add them. 1/2 + 2/4 = x. 2 is the denominator of the first fraction, but it does not match the denominator of the second fraction. So a common factor is used to modify the fraction. 2 is the common factor. 1 multiplied by 2 equals 2. 2 multiplied by 2 equals 4. Now the equation states 2/4 + 2/4 = x. These fractions can now be added together because both of the denominators match. The denominator remains the same when fractions add together. This means the denominator is still 4. The numerators combine. This means 2/4 + 2/4 = 4/4. 4/4 = x. Divide the numerator by the denominator to simplify 4/4. 4 divided by 4 equals 1. 1 = x.

Fractions multliply and divide. Numerators multiply numerators and denominators multiply denominators. 2/3(1/5) = 2/15. 1/2(13) = 1/6. 4/5(3/4) = 12/20 = 6/10 = 3/5. Reciprocals are used when fractions divide. A reciprocal is an inverted fraction. 2/3 divided by 1/2 = 4/3 = 1 1/3. 1/2 is inverted in this equation. 2/1 is the "reciprocal" of 1/2. The first fraction remains 2/3. 2/3 then multlied the reciprocal. In other words, 2/3(2/1) = 4/3 = 1 1/3. The first fraction multiplies the reciprocal of the second fraction when fractions must divide.