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vampirchik [111]
3 years ago
6

Please help! Explanation please!​

Mathematics
1 answer:
Mnenie [13.5K]3 years ago
5 0

Answer:

11 meters.

Step-by-step explanation:

The important thing to note here is that the backyard is a square. Since it's a square, all of its sides all equivalent in length. Thus, let's find the length of the sides. To do this, we use the area formula.

The formula for the area of a square is:

A=n^2

Where <em>n</em> is a side. Since we know the area already, we can find n. Find <em>n: </em>

<em />121=n^2\\n=11<em />

Since every side in a square are equivalent, all sides are 11 meters in length.

Therefore, each section of the fence should be 11 meters long.

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13. Find the smallest number which when divided by 21,28,36 and 44 leaves a
OleMash [197]

Answer:

2775

Step-by-step explanation:

Well of course since the problem is not restricted, the smallest number is 3. I'm almost sure that's not what you mean. The next smallest number is 2775. I found that using a  programing language. I'm sure as well that does not satisfy the question, either.

I think you are intended to do this by finding the lowest common multiple and adding 3.

21: 3 * 7

28: 2 * 2 * 7

36: 2 * 2 * 3 * 3

44: 2 * 2 * 11

LCM = 2 * 2 * 3 * 3 * 7 * 11 = 2772

Now add 3 and the number you want is 2775

8 0
3 years ago
HELPPP ALSO SORRY FRO THE PIC
Eddi Din [679]

Answer:

The numbers below are all grater than one:

#2

#3

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Step-by-step explanation:

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8 0
3 years ago
Jenny knit a total of 12 centimeters of scarf over 2 nights. How many nights will Jenny have
faust18 [17]

As we can assume the relationship is directly proportional, we have to build the proportion and do the cross product. So:

\begin{gathered} \frac{12cm}{\text{2 nights}}=\frac{18cm}{x\text{ nights}} \\ 12x=2\cdot18 \\ 12x=36 \\ x=\frac{36}{12} \\ x=3 \end{gathered}

She needs 3 nights

4 0
1 year ago
This graph represents
hram777 [196]
It is C (2, 1) I think it is because they intersect
8 0
3 years ago
The approximate molar concentration of several chemicals are given. Find the pH of each use the calculator and round to the near
svet-max [94.6K]

Explanation:

Formula to calculate pH of a chemical or solution is as follows.

                    pH = -log [H^{+}]

Therefore, calculate the pH of given chemicals as follows.

1). Oven cleaner

              pH = -log [H^{+}]

                    = -log [10^{-13}]

                    =  13

2). Water

               pH = -log [H^{+}]

                     = -log [7 \times 10^{-7}]

                     = 6.15

3). Blood

               pH = -log [H^{+}]    

                     = -log [4 \times 10^{-8}]

                     = 7.40

4). Vinegar

                pH = -log [H^{+}]    

                      = -log [63 \times 10^{-4}]

                      = 2.20          

3 0
3 years ago
Read 2 more answers
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