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Mariana [72]
2 years ago
9

Find the value of x and y

Mathematics
1 answer:
elena55 [62]2 years ago
3 0

Answer:

x=50 and y=20

Step-by-step explanation:

I hope this helped!

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Annie estimates that the height of a bookcase is 78.25 in. The actual height is 75.50 in. To the nearest tenth of a percent, wha
Vinil7 [7]

Answer  

Find out the  percent error in Annie's estimate .

To prove

Formula

Percentage\ error = \frac{error\times 100}{exact\ value}

As  error = approx value -  exact value

As given

Annie estimates that the height of a bookcase is 78.25 in.

The actual height is 75.50 in.

approx value = 78.25 in.

actual value = 75.50 in.

error = 78 .25 - 75 .50

        = 2.75

put in the formula

Percentage\ error = \frac{2.75\times 100}{75.50}

Percentage\ error = \frac{27500}{7550}

Percentage error = 3.64 % (approx)

Therefore the Percentage error be 3.64 % (approx).

6 0
3 years ago
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Sophie planted seeds in
saw5 [17]

Answer:

idk

Step-by-step explanation:

6 0
3 years ago
What is the value of the discriminant for the quadratic equation -3=-x^2+2x? discriminant =b^2-4ac
Elena L [17]

Answer:

<h2>D = 16</h2>

Step-by-step explanation:

-x^2+2x=-3\qquad\text{add 3 to both sides}\\\\-x^2+2x+3=0\\\\a=-1,\ b=2,\ c=3\\\\\text{Substitute to}\ D=b^2-4ac:\\\\D=2^2-4(-1)(3)=4+12=16

9 0
4 years ago
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The FBI wants to determine the effectiveness of their 1010 Most Wanted list. To do so, they need to find out the fraction of peo
Murrr4er [49]

Answer:

The proportion of people who were caught after being on the 1010 Most Wanted list would be 40.81%.

Step-by-step explanation:

Since the FBI wants to determine the effectiveness of their 1010 Most Wanted list, and to do so, they need to find out the fraction of people who appear on the list that are actually caught, supposing a sample of 517517 suspected criminals is drawn, and of these people, 211211 were captured, to estimate the proportion of people who were caught after being on the 1010 Most Wanted list using this data, the following calculation must be performed:

517,517 = 100

211,211 = X

211,211 x 100 / 517,517 = X

21,121,100 / 517,517 = X

40.81 = X

Therefore, the proportion of people who were caught after being on the 1010 Most Wanted list would be 40.81%.

4 0
3 years ago
Which expression has a positive value?<br> (-5)(-9)<br> 2-4<br> 12-1-4)<br> -3+(-7)
11111nata11111 [884]

Answer:

(-5)(-9)

Step-by-step explanation:

any negative multiplied by any negative will always equal a positive

7 0
3 years ago
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