A en 7 paquetes hay 56 galletitas y en 9 paquetes hay 72 galletitas. a ¿ que cantidad de galletitas hay en 4 paquetes? ¿ y en 14?
b Si sobre la mesa se cuentan 80 galletitas, ¿ cuantos paquetes se abriran
c Para responder algunas preguntas de las anteriores ¿ aberiguaron cuantas hay en un solo paquete? ¿ por que?

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

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?