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galina1969 [7]
3 years ago
14

One of the rules in a public speaking contest requires contestants to speak for as close to 55 minutes (300(300 seconds)) as pos

sible. Contestants lose 33 points for each second they speak either over or under 55 minutes. Which expression below can be used to determine the number of points a contestant loses if she speaks for xx seconds? Choose 1 answer: 3|x-300|
Mathematics
1 answer:
Mariana [72]3 years ago
3 0

Solution:

Duration of time for which a contestant have to speak = 5 minutes (300 Seconds)

Point lost by a contestant for over-speaking that is for more than 5 minutes for each second = 3 points

Point lost by a contestant for speaking less than 5 minutes on each second = 3 points

So, the expression which can determine ,the number of points a contestant loses if she speaks for x seconds.

⇒Number of points a contestant loses if she speaks for x seconds=3 \times\left |x-300 \right |

For, example if a contestant speaks for 290 seconds,Points lost by contestant = 3 \times\left |290-300 \right |=3 × 10= 30 Points

If a contestant speaks for 305 seconds,Points lost by contestant = 3 \times\left |305-300 \right |=3 × 5= 15 Points

Option (A)= 3 \times\left |x-300 \right | is right choice describing above situation.

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3 years ago
What number is in the hundreds place after
Vika [28.1K]

The digit in the hundreds place is 4

From the question, we have

(21 × 10¹)+(3×10²) + (9 × 10²)

=210+300+900

=1410

The digit in the hundreds place is 4 and the value is 400.

Multiplication:

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6 0
1 year ago
Jason's two test scores in English are 87 and 91. What must he score on the third test to get an average test score of 92 or bet
irga5000 [103]

You first find the average of the first two test scores. When you find the average, you add the two numbers together and then divide by two which gives you 89. You then plug in different scores above the number 89 and find the average of those (89 and x) to see which gives you an average of 92. It’s mostly a guess and check type of problem.

5 0
3 years ago
Which of these equations is for a line perpendicular to y-3=5(x-2)?
olasank [31]

Answer:

C

Step-by-step explanation:

y-3=5(x-2)  (rearrange this to be in slope- intercept from) (add 3 to both sides)

y = 5(x-2) + 3   (distribute parentheses)

y = x(5) - 2(5) + 3

y = 5x -10 + 3

y = 5x - 7

recall that for a line with gradient m, the gradient of the perpendicular line will be - (1/m)

hence in our case, our gradient of the original line is 5, hence the gradient of the perpendicular line is -1/5

From the choices, the only one that is consistent with this is C

i.e choice C:

5y + x = 25

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6 0
2 years ago
Guys Please help me with this question urgent!!
Viefleur [7K]

Answer:

9

Step-by-step explanation:

1.)Find the amount of women within the 120 people in the meeting. So 3/10*120 , you get 36.

2.)Add 24 to 120 to get the new amount of people in the room. So 144.

3.)Using the new ratio 11:5 , find the amount of total women out of 144 people . So 5/16*144 , you get 45.

4.)Now minus the 2 amounts of initial women from the amount of total new women , to get the difference to find out how many women are there in the 24 people. So 45-36 , you get 9

6 0
3 years ago
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