-7+(-3) equals -10 so maybe that might help you
Angles 6 and 7 are vertical angles
Ans: B
The method (a^2-b^2) is considered as one of the many ways of factorisation.
Hope this can help.
Let 6x represent the men
5x represents the women
The ratio of men to women is 6 to 5 or 6/5
6x / 5x = 1500/ W where W is the number of women
6/5 = 1500/W
W = 1250 women
