4. Joe can rake the leaves of his yard in 50 minutes. His brother can rake the leaves of the same yard in 70 minutes. Determine the amount of time that it will take to rake the leaves if they work together.

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

What is f(3) for the quadratic functionf(x)=2x2 + x – 12? f -3g 3h 6i. 9

What is the slope of the line shown below?