Paula has a dog that weighs 3 times as much as Carla's dog. The total weight of the dogs is 80 pounds. How much does Paula's dog weigh? Use the diagram to find the weight of Paula's dog.

60 lb

Step-by-step explanation:

Represent the weights of the dogs by P and C. Then P = 3C.

Then P + C = 80, or, after substitution of 3C for P,

3C + C = 80, or

4C = 20, so that C = (20 pounds)

Paula's dog weighs 3 times as much as Carla's:  P = 3(20 lb) = 60 lb

ok

step-by-step explanation:

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i