T are the domain and range of f (x) = (1/5)^x?
A. The domain is all real numbers.
B. The range is all real numbers.
C. The domain is all real numbers.
D. The range is all real numbers greater than zero.

es la c. consiste en todos los  numeros reales

Step-by-step explanation:

Por ejemplo, el dominio de f(x)=x² consiste de todos los números reales, y el dominio de g(x)=1/x consiste de todos los números reales excepto x=0.

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

quit

step-by-step explanation: