Question 1(Multiple Choice Worth 1 points)
(02.04 LC)
A student is running a 3-kilometer race. He runs 1 kilometer every 2 minutes, Select the function that
describes his distance from the finish line after x minutes.
f(x)=-1/3x+2
f(x)=-1/2x+3
f(x)=1/2x+3
f(x)=1/3x+2

f(x)=-1/2x+3

Step-by-step explanation:

In this problem, the student is running a 3-kilometer race.

This means that the total length of the race is 3 km.

We also know that the student runs 1 kilometer every 2 minutes. For a uniform motion, the speed is given by

where in this case,

d = 1 km is the distance

t = 2 min is the time

So the speed is

We can therefore write the distance covered by the student (from the starting line) after x minutes as

However, here we want to write an expression for the distance of the student from the finish line.

Since the distance from the finish line at x = 0 is 3, therefore the distance from the finish line after x minutes is:

d = 3 - y'

So

which corresponds to the option:

f(x)=-1/2x+3

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column