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FinnZ [79.3K]
3 years ago
12

Jay's mean score for four quizzes is 99. ​ ​His scores for the first three quizzes are 88 , 55 , and 99. ​ ​What is Jay's score

for the last quiz?
Mathematics
1 answer:
Katarina [22]3 years ago
6 0

Answer: 154

Step-by-step explanation:

The mean is calculated by adding up all the numbers and dividing by the number of observations added up.

The above can therefore be expressed as:

(88 + 55 + 99 + x) / 4 = 99

242 + x = 99 * 4

242 + x = 396

x = 396 - 242

x = 154

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Find the number of sides for a regular polygon whose interior angles each measure 10 times each exterior angle
gavmur [86]

Answer:

22 sides

Step-by-step explanation:

The expression to find an interior angle of a polygon is:

\frac{(n-2)*180}{n}

The expression to find an exterior angle of a polygon is:

\frac{360}{n}

Please note that "n" represents the number of sides the polygon has.

We can use these two expressions to set up an equation.

\frac{(n-2)*180}{n}=10(\frac{360}{n})

Multiply both sides by "n":

(n-2)*180=10n(\frac{360}{n})

Now, distribute:

180(n)-180(2)=\frac{3600n}{n}\\180n-360=3600

Divide both sides by 10:

\frac{180n}{10}-\frac{360}{10}=\frac{3600}{10}\\

18n-36=360

Add 36 to both sides:

18n=360+36\\18n=396

Divide both sides by 18:

n=22

The polygon has 22 sides

6 0
3 years ago
If a household is saving 30% of their total bi-weekly gross pay of $2,051.00, determine how many months it will take to save a 2
Anna35 [415]

Based on the amount saved per week and the down payment of the property, the number of months it will take to save the amount is 46 months.

<h3>How long will it take for the family to save the amount?</h3>

First, find out the amount saved per month:

= (30% x 2,051) x 2 payments a month

= $1,230.60

The downpayment is:

= 281,700 x 20%

= $56,340

The closing cost is:

= 1.15 x 56,230

= $843.45

The number of months till the amount is saved is:

= (56,340 + 843.45) / 1,230.60

= 46 months

Find out more on mortgage downpayments at brainly.com/question/9893085.

#SPJ1

7 0
2 years ago
The parking garage has 9 rows with 10 parking space in each row . There are 8 empty space . How many space are filled.
tatiyna

Answer:

82 .

Step-by-step explanation:

9x 10 = 90 then 90-8 = 82 that how many spaces are filled .

7 0
3 years ago
If X = 2 centimeters, Y = 6 centimeters, and Z = 6 centimeters, what is the area of the object?
Sedbober [7]

In order to answer the question, it's absolutely essential to have
enough of a description of the object to know which of its parts 
'X', 'Y', and 'Z' are, and what other parts it may have.

An ideal way to accomplish this would have been for you to include the
picture that accompanies the question, wherever you copied it from.


4 0
4 years ago
A company overvalues its shares by 25 percent. If the quoted price of a share is $300, what is the true and fair price of the sh
Ksivusya [100]


From the information given, the shares are overpriced by 25%, therefore the shares stand at 125%

We need to find out the price value of 1% share.

125% = 300$

1% =  x    (where x is the value in dollars of 1% shares)

Simplify the above equation by cross multiplying , so:

125 × x = 300 ×1

125 x = 300

x = 300/125

x= 2.4 $

1% share  price is 2.4 dollars. How about the true share price? The true share price is at 100%

100% share price value is 2.4 × 100 = 240

Therefore the true and fair price of the shares is $ 240




4 0
4 years ago
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