Cities H and K are located on the same line of longitude. The difference in the latitude of these cities is 9º, as shown in the diagram below. „H
3,954 mi.
If Earth's radius is 3,954 miles, to the nearest mile, how many miles north of city K is city Halong arc HK?

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

you can use a^2+ b^2=c^2

48+y= ?

the y is the variable and the ? could also be a variable