what is he answer to 3x + 6y = 12

The half-life of 92 U 238 against alpha decay is 4.5 x 109 years. How many disintegrations per second occur in 1 g of 92 U 238 ? Suggested solution: Again, since one k mole of any isotope contains Avogadro's number of atoms, there fore 1 g of 92 U 238 contains Half ..

The given equations are 2x - y + z = -3 3x - 0.y - z = - 8 2x + 6y + 0.z= 2 = 2(6) +1(2) + 1(18) = 12 +2 + 18 = 32 The system has a unique solutions. A 1 1 = (0 + ..

x+3y=6 x=6-3y y=2, x=6-3y =6-3(2) =6-6 x=0 y=0, x=6-3y =6-3(0) =6-0 x=6 y..

Method of Elimination - Solve: 3x - 4y = 20 (i) 5x + 6y = 8 (ii) Multiply (i) by 3 and (ii) by 2: Adding the two, 19x = 76 Substituting x = 4 in (ii), we get 5(4) + 6y = 8 6y..

. Six years hence a man's age will be three times his son's age, and three years ago he was nine times as old as his son. Find their present ages. Let the present age of the man be x years, and the present age of his son be y years. 6 years hence their ages will be (..

12. - The half-life of 92 U 238 against alpha decay is 4.5 x 109 years. How many disintegrations per second occur in 1 g of 92 U 238 ? Suggested solution: Again, since one k mole of any isotope contains Avogadro's number of atoms, there fore 1 g of 92 U 238 contains Half life T ..

Twelve teams are participating in a tournament. Each team has 27 players. How many players are there altogether? => 326 or 327 or 324 or 224..

Simplify: 6x-3 4x-12 + 6x+4 4x-12 - 3x+28 4x-12 => 9 3 or 4 9 or 3 9 or 9 4..

Which inequality satisfies the expression? - 1 3x ≥ 4 => x ≤ 1 -12 or x ≤ 1 12 or x ≥ 1 -12 or x ≥ 1 12..

Calculate the dispersive power for crown and flint glass from the following data: C D F Crown 1.5145 1.5170 1.5230 Flint 1.6444 1.6520 1.66..