Half marathon is 13.1 miles long. thursday what is station every 111/120 miles along the race trail. which expression represents the total number of water stations a(13.1-111/120) b(13.1+111/120) c(13.1(111/120)) d(13.1÷111/120)

Step-by-step explanation:

If every 111/120 miles is a station, and total miles long is 13.1, the procedure to calculate the total number of stations is:

111/120 = 0.925; which means that there's a station every 0.925 miles. This number must divide the total 13.1 miles, to know how many stations there are.

13.1/0.925=14.16.

Therefore, there are 14 water stations.

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: