A cable is tied around the Earth at the equator. A longer second cable is placed so that it is always exactly 5 feet directly above the Earth's equator. What is the positive difference in the number of feet in the lengths of the two cables? The answer should be xπ . Find x .

Step-by-step explanation:

Whatever you add to the circumference, divide that by pi, that's what's added to the diameter.

6/2Fpi = 1.909859 ft added to the diameter

we want to know what's added to the radius

Divide it by 2 and you have .955 ft (about 11.46 inches) plenty room for a worm

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18