The vertices of triangle abc are a(2,3), b(–1,2), and c(3,1). if δdef ∼ δabc and de = 4ab, what is the length of ef? the answers are √10,√17,4√10,4√17

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need

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?

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2