Actividad 1) Calcular: Sen (x+y) + Sen (x-y) 2) Calcular: Cos (x+y) - Cos (x-y) 3) Calcular: 1\2 [Cos (A+B) + Cos (A-B) 4) Si Sen x= 3/5, Sen y= 1/3, Cos x= 3/13 y Cos y= 5/13 Calcula: Sen (x+y) y Sen (x-y) 5) calcular: Sen (60°+x) +Sen (60°-x) dividido/ Cos x 6) Si tan 45°= 1 y Tan 37°=3/4. Calcular: Tan 8° y Tan 82°

True or false look at the picture pls : /

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?

Atype of plant is introduced into an ecosystem and quickly begins to take over. a scientist counts the number of plants after mmonths and develops the equation p(m)= 19.3(1.089)^m to model the situation. most recently, the scientist counted 138 plants.assuming there are no limiting factors to the growth of the plants, about how many months have passed since the plants werefirst introduced? a)o 6.1b)0.6.6c)10 72d)o 23.1