It's 154. The easiest way to multiply a number is to get it as close to a multiple of 10 as possible. In our case it's 20 x 7, which is 140. Then we have 2 x 7 which 14. 140 + 14 is 154.As an example: If we do 24 x 90, we essentially have 20 x 90 which is 1800 and 4 x 90 which is 360. Therefore we have 2160.
(x + 7)2 = 5 x + 7 = ±√5 x + 7 - 7 = -7 ± √5 x = -7 ± √5
y=7+x =x=7-x
If (x + 3)(x +7) = 0 then either: x + 3 = 0 or x + 7 = 7 Hence x = -3 or -7.
x/35 =7 (x/35) *35 = 7 * 35 {multiply both sides by 7} x = 7 * 35 x = 245
LCM x GCD = 140 x 77 140 = 2 x 2 x 5 x 7 77 = 7 x 11 GCD = 7 LCM = 140 x 77 / 7 = 140 x 11 = 1540
2 x 7 x 7 = 98 2 x 2 x 5 x 7 = 140
the answer is 140 .
Simple, write it like you say it: 7 = x (140) 7 = 140x ---- ----- 140 140 x=0.05 (5%) Answer: 0.05 (5%)
140 = 2 x 2 x 5 x 7
7 times what = 980
91 = 7 x 13, 140 = 2 x 2 x 5 x 7 so HCF is 7
140/20=7
4 and 5 and 7 have no common factors. So their LCM is 4 x 5 x 7 = 140.
2 x 2 x 5 x 7 = 140
140 = 2 x 2 x 5 x 7
2 x 2 x 5 x 7 = 140