There are four children in a family, two girls, Kate and sally, and two boys, tom and Ben.
tom is 2 years older than Ben.
The combined ages of the two boys is equal to the combined ages of the two girls.
Kate is twice as old as sally.
A year ago tom was twice as old as sally was then.
How old are the children now?

You are cycling around europe with friends. you book into a hostel and you ask the owner what the ratio of men to women is currently staying there. there are 24 men and 6 women. what is the ratio of men to women in its simplest form?

15/16 as a decimal rounded to the nearest hundredth

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?