### Фй лЭне пй чсЮуфет -Уэнфбоз ксйфйкЮт

Ден енфпрЯубме ксйфйкЭт уфйт ухнЮиейт фпрпиеуЯет.

### Ресйечьменб

 FRACTIONAL EQUATIONS 115 GRAPHS 137 SIMULTANEOUS SIMPLE EQUATIONS 147
 PROGRESSIONS 317 SIMPLE INDETERMINATE EQUATIONS 335 PERMUTATIONS AND COMBINATIONS 348

### ДзмпцйлЮ брпурЬумбфб

УелЯдб 87 - If the numerator and denominator of each fraction is multiplied (or divided) by the same number, the value of the fraction will not change.
УелЯдб 291 - If the product of two numbers is equal to the product of two other numbers, either pair may be made the means, and the other pair the extremes, of a proportion.
УелЯдб 67 - Divide the first term of the dividend by the first term of the divisor, and write the result as the first term of the quotient. Multiply the whole divisor by the first term of the quotient, and subtract the product from the dividend.
УелЯдб 60 - The square of the sum of two numbers is equal to the square of the first number plus twice the product of the first and second number plus the square of the second number.
УелЯдб 303 - У . 18 2. Given that the area of a triangle varies jointly as its base and altitude, what will be the base of a triangle whose altitude is 12, equivalent to the sum of two triangles whose bases are 10 and 6, and altitudes 3 and 9, respectively...
УелЯдб 50 - Multiply every term of the multiplicand by each term of the multiplier, and add the partial products.
УелЯдб 301 - The weight of an object above the surface of the earth varies inversely as the square of its distance from the center of the earth.
УелЯдб 298 - One quantity is said to vary directly as a second and inversely as a third, when it varies jointly as the second and the reciprocal of the third. Thus...
УелЯдб 337 - The number of permutations of n different things taken r at a time is denoted by „Pr.
УелЯдб 87 - To reduce a Fraction to its Lowest Terms. — A fraction is in its lowest terms when the numerator and denominator...