En un plano hay tres circunferencias determinadas por las siguientes ecuaciones. (x+9)^2+(y-7)^2=5 (x+7)^2+(y-8)^2=3 (x-4)^2+(y+3)^2=4 Los centros de las circunferencias determinan un triángulo. ¿Cuál es el perímetro de dicho triángulo? (Clave: identifique los centros de las circunferencias, luego calcule las distancias con la fórmula de distancia entre puntos).

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?

The frequency table shows the results of a survey comparing the number of beach towels sold for full price and at a discount during each of the three summer months. the store owner converts the frequency table to a conditional relative frequency table by row. which value should he use for x? round to the nearest hundredth. 0.89 0.90 0.92 0.96

What is the equation of the line that is parallel to the line with the equation y= -3/4x +1 and passes through the point (12,-12)