Which of the following expressions is equivalent to -3(-x+12)?
a: 9-x
b: -3x-36
c: x+9
d: 3x-36

Acable company wants to provide cell phone service for residents on an island. the function for the cost of laying the cable from the island to the mainland is c(x)= 6.500 square root x2+4, where x represents the length of the cable in feet. what are the domain and range of the function? a) domain: all real numbers range: all real numbers greater than or equal to 17,000 b) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 17,000 c) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 13,000 d) domain: all real numbers greater than or equal to 13,000 range: all real numbers greater than or equal to 0

Can someone me do math because i am having a breakdown rn because i don’t get it

Evaluate cos2θ for cosθ = square root of 3/2