### тИ КщМЕ ОИ ВЯчСТЕР -сЩМТАНГ ЙЯИТИЙчР

дЕМ ЕМТОПъСАЛЕ ЙЯИТИЙщР СТИР СУМчХЕИР ТОПОХЕСъЕР.

### пЕЯИЕВЭЛЕМА

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

### дГЛОЖИКч АПОСПэСЛАТА

сЕКъДА 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.
сЕКъДА 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.
сЕКъДА 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.
сЕКъДА 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.
сЕКъДА 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...
сЕКъДА 50 - Multiply every term of the multiplicand by each term of the multiplier, and add the partial products.
сЕКъДА 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.
сЕКъДА 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...
сЕКъДА 337 - The number of permutations of n different things taken r at a time is denoted by „Pr.
сЕКъДА 87 - To reduce a Fraction to its Lowest Terms. — A fraction is in its lowest terms when the numerator and denominator...