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Sedaia [141]
3 years ago
14

The perimeter of a rectangular field is 374 yard. If the length of the field is 99 yards, what is its width?

Mathematics
2 answers:
Katyanochek1 [597]3 years ago
6 0
What is important in this problem is the equation for Perimeter 
Perimeter = 2Length + 2Width 
So 99 = length (l) 
374 = 2(99) + 2(w) 
374 = 198 + 2w 
Subtract 
176 = 2w 
Divide both sides by  2 
88 = w 
The Width is 88 yards 

likoan [24]3 years ago
3 0
The perimeter of a rectangle is 2*L+2*W. Knowing that length is 99, we do 2*99 to get 198.Do 374-198, which is 176, we know that that is twice the length of the width. Therefore the width is 176/2, which is 88.
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Determine what type of observational study is described. Explain. Researchers wanted to determine whether there was an associati
34kurt

Answer:

B. The observational study is a cross-sectional study because information is collected at a specific point in time.

Step-by-step explanation:

1) There are three types of Observational Studies: Case-control, cross-sectional and Cohort.

2) Since the researchers collected information from those 1800 adults at a certain time, then we can call it a cross-sectional study. It does not provide solid results since the research was not done over a period to collect further information. We don't know, for example, much more than what that association deeply mean.

3) If we wonder more, then the researchers would have to track those adults over a given period, i.e. a Cohort would be necessary.

4) Moreover, it's not "retrospective" for virtually every question, always makes us look back somehow, and it does not categorize a kind of observational study.

6 0
3 years ago
A rectangular box is 6 inches wide 10 inches long and 2 inches tall how much wrapping paper is needed to cover the box exactly
stepladder [879]

Answer:

184 in²

Step-by-step explanation:

Given :

Width, w = 6 inches

Length, l = 10 inches

Height, h = 2 inches

To obtain how much wrapping paper is needed ; we take the surface area of the box

Surface area = 2(lw + lh + wh)

Surface area = 2((6*10) + (6*2) + (10*2))

Surface area = 2(60 + 12 + 20)

Surface area = 2(92)

Surface area = 184 in²

The amount of wrapping paper needed = 184 in²

7 0
3 years ago
3/5 of a number decreased by one is 23. What is the number?
garri49 [273]
You can set up an equation based off of the information given:

x represents the unknown number

3/5x - 1 = 23

add 1 to both sides to isolate the 3/5x

3/5x = 24

divide both sides by 3/5 to solve for x

x = 120/3

120/3 can be simplified into 40

Final answer: x = 40
5 0
3 years ago
Subtract the following polynomials. Write answer in a-b-c-d order. From 4a+7b-12c subtract 8a-9b+12d
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(4a+7b-12c)-(8a-9b+12d)\\4a+7b-12c-8a+9b-12d

Negative multiply negative = Positive

Negative multiply positive = negative

-8a+4a+9b+7b-12c-12d\\-4a+16b-12c-12d

Thus the answer is -4a + 16b - 12c - 12d.

4 0
2 years ago
Simplify -6<br> .<br> 2<br> 041<br> 318<br> 4<br> 8<br> 318
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- 6 \frac{1}{4}  - ( - 2 \frac{1}{8} )

=  - 6 \frac{1}{4}  + 2 \frac{1}{8}

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=   \frac{  - 50}{8}  +  \frac{17}{8}

= \frac{ - 50 + 17}{8}

=  \frac{ - 33}{8}

=  - 4 \frac{1}{8}

8 0
2 years ago
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