One yardstick for measuring how steadily—if slowly—athletic performance has improved is the mile run. In 1957, the local record for the running of a certain distance was 3 minutes, 59.2 seconds, or 239.2 seconds. In the half-century since then, the record has decreased by 0.4 seconds per year. a.) Express the record time for the mile run, M, as a function of the number of years after 1957, x.
b.) If this trend continues, in which year will someone run a 3-minute or 180-second, mile?

c.

step-by-step explanation:

first one is a: renaming a fraction. second one is c: de-c

step-by-step explanation:

my explanation is that these were the answers on edg : )

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or  

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,