A popular race is called a 10K because it is 10 kilometers in length. If one mile is approximately 1.6 kilometers, then how many miles is the race?

A 10k is totally 6.2 miles.

Step-by-step explanation:

The 'K' stands for kilometer, which is 0.62 miles or 1093.6 yards. Therefore, a 10K is 10 kilometres (10,000 meters) or 6.2 miles. It's double the distance of a 5K race.

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