2/7 times 4/5 = 8/35
3 over 5 is the same as 9 over 15 so x = 7 over 15.
2/9 x 7/18 = 14/162 or 7/81
5 x 9/20 = 45/20 = 9/4 or 2 and 1/4
(x + 7)2 = 5 x + 7 = ±√5 x + 7 - 7 = -7 ± √5 x = -7 ± √5
5 x 7 x 7= 245
Prime factors are 5, 5, 7, 7. Factors are any combination of the above, i.e. 5 x 5 = 25 5 x 7 = 35 7 x 7 = 49 5 x 5 x 7 = 175 5 x 7 x 7 = 245
5 x 5 x 5 x 7 x 7 x 7 = 42875
5 x 5 x 7 x 7 and the other one is 1 x 5 x 7 x 35
5 x 7 x 7
35 = 5 x 7 105 = 5 x 7 x 3 175 = 5 x 7 x 5 gcf = 5 x 7 x 3 x 5 = 105 x 5 = 525
1 x 7 = 71 x 5 = 52 x 7 = 142 x 5 = 103 x 7 = 213 x 5 = 154 x 7 = 284 x 5 = 205 x 7 = 355 x 5 = 256 x 5 = 307 x 5 = 35It is the first and lowest multiple that 5 and 7 have in common, therefore, it is called the least common multiple.
4900 = 2 x 2 x 5 x 5 x 7 x 7 or 22 x 52 x 72