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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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Answer:

The correct option is B) 26x26x10^4.

Step-by-step explanation:

Consider the provided information.

It is given that the Wisconsin consist of 2 letter and 4 digits. And two letters always precede the digits.

There are 26 Alphabet so that means for alphabets we have 26 choices also we for digits we have 10 choices (0 to 9).

However, only digits can repeat. For first letter we have 26 choices for second we have only 25 choices left, similarly for digits we have 10 choices but repetition is allow so we can choose same number.  the number of possible plates are:

26×25×10×10×10×10

Which also can be written as:

26 \times 25 \times 10^{4}

Hence, the correct option is B) 26x26x10^4.

8 0
3 years ago
What is the value of x when y equals 2 in the equation y equals x over 4 - 7
Alex

The value of x when y = 2 is x = 36

Step-by-step explanation:

The equation that we have in this problem is:

y=\frac{x}{4}-7

In order to find the value of x when y is equal to

y = 2

We need to re-arrange the equation making x the subject.

We proceed as follows:

1) We add +7 on both sides:

y+7=\frac{x}{4}-7+7\\y+7=\frac{x}{4}

2) Now we multiply both  sides by 4:

4(y+7)=\frac{x}{4}\cdot 4\\x=4(y+7)

3) Now we can substitute y = 2 and find the value of x:

x=4(2+7)=4(9)=36

Learn more about equations:

brainly.com/question/13168205

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5 0
3 years ago
By what percent will a fraction increase if its numerator is decreased by 30% and its denominator is decreased by 50%?
Alex Ar [27]
(X + .3X) / (X - 0.5X) = 1.3X/0.5X
1.3/0.5 = 2.6
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3 years ago
If the shape of an object changes the perimeter will always change true or false
Ugo [173]

The answer is false due to the object is changes shape not size

6 0
3 years ago
The sector COB is cut from the circle with center O. The ratio of the area of the sector removed from the whole circle to the ar
mafiozo [28]

Answer:

Ratio = \frac{R^2 - r^2 }{ r^2}

Step-by-step explanation:

Given

See attachment for circles

Required

Ratio of the outer sector to inner sector

The area of a sector is:

Area = \frac{\theta}{360}\pi r^2

For the inner circle

r \to radius

The sector of the inner circle has the following area

A_1 = \frac{\theta}{360}\pi r^2

For the whole circle

R \to Radius

The sector of the outer sector has the following area

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So, the ratio of the outer sector to the inner sector is:

Ratio = A_2 : A_1

Ratio = \frac{\theta}{360}\pi (R^2 - r^2) : \frac{\theta}{360}\pi r^2

Cancel out common factor

Ratio = R^2 - r^2 : r^2

Express as fraction

Ratio = \frac{R^2 - r^2 }{ r^2}

6 0
2 years ago
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