2x - 10 =30 2x -10 = 30 +10 +10 2x = 40 /2 /2 x = 20
x^2 + 13x + 30 = 0 x^2 + 10x + 3x + 30 = 0 x(x + 10) + 3(x + 10) = 0 (x + 3)(x + 10) = 0 x = -3 or x = -10
0.2 is 2/10 so 0.2*30 = (2/10)*30 = 2*30/10 = 60/10 = 6
7
1 x 30, 2 x 15, 3 x 10, 5 x 6, 6 x 5, 10 x 3, 15 x 2, 30 x 1.
2 x 5 = 10 2 x 3 x 5 = 30
30 = 2 x 3 x 5 50 = 2 x 5 x 5 100 = 2 x 2 x 5 x 5 GCF = 2 x 5 = 10
2x - 10 =30 2x -10 = 30 +10 +10 2x = 40 /2 /2 x = 20
20/30 = (2 x 10)/(3 x 10) = 2/3
x^2 + 13x + 30 = 0 x^2 + 10x + 3x + 30 = 0 x(x + 10) + 3(x + 10) = 0 (x + 3)(x + 10) = 0 x = -3 or x = -10
0.2 is 2/10 so 0.2*30 = (2/10)*30 = 2*30/10 = 60/10 = 6
1 x 30, 2 x 15, 3 x 10, 5 x 6, 6 x 5, 10 x 3, 15 x 2, 30 x 1
30 = 2 x 3 x 5 40 = 2 x 2 x 2 x 5 GCF = 2 x 5 = 10
2 x 5 = 10 2 x 11 = 22 2 x 2 x 7 = 28 2 x 3 x 5 = 30
7
Because 10 divides evenly into 30 with no remainder.
1 x 30, 2 x 15, 3 x 10, 5 x 6, 6 x 5, 10 x 3, 15 x 2, 30 x 1