One of the rules in a public speaking contest requires contestants to speak for as close to 5
55 minutes
(
300
(300left parenthesis, 300 seconds
)
)right parenthesis as possible. Contestants lose
3
33 points for each second they speak either over or under
5
55 minutes. Which expression below can be used to determine the number of points a contestant loses if she speaks for
x
xx seconds?
Choose 1

(Choice A)
A
3
∣
x
−
300
∣

Question:

One of the rules in a public speaking contest requires contestants to speak for as close to 5 minutes (300 seconds) as possible. Contestants lose 3 points for each second they speak either over or under 5 minutes. Which expression below can be used to determine the number of points a contestant loses if she speaks for x seconds?

Step-by-step explanation:

Given

each

Required

Points lost for x seconds

First, we calculate the total possible points gained.

Next, we calculate the total points acquired for x seconds

The lost is then calculated using:

Factorize:

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

sinn is the total amount of students now and m were the students before, you subtract them both (n-m) and divide that by m. then, since to get a percentage from a fraction you have to multiply by 100, your answer should look like this: n-m/m*100

step-by-step explanation: