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masya89 [10]
3 years ago
12

A post is put every 6 feet along a fence around a rectangular field that is 42 feet long and 36 feet wide. What is the total num

ber of feet around the field? *
Mathematics
1 answer:
postnew [5]3 years ago
6 0

Answer:

26 posts

Step-by-step explanation:

find perimeter:

42+42+36+36= 156

divide by 6

156/6=26

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muminat
See photo for drawing. 
Words: 
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50%: the square is divided into two equal parts, and one of them is shaded, therefore it is 50%. 
25%: the square is divided into 4 equal parts, and one of them is shaded, therefore it is 25%. 
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7 0
3 years ago
Using the drawing tool, graph the two inequalities on the number line. Take a screenshot of each number line and submit it in th
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Zero on number lines is neither negative nor positive, it is used as a sort of divider number;)

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4 0
3 years ago
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How to solve this :') please help
blsea [12.9K]

Answer:

3/2

Step-by-step explanation:

sin(3π/4 - β) = sin(3π/4)cosβ - cos(3π/4)sinπ =

\sin(\frac{3\pi}{4}-\beta)=\sin(\frac{3\pi}{4})\cos\beta-\cos\frac{3\pi}{4}\sin\beta\\=\frac{1}{\sqrt{2}}\cos\beta-(-\frac{1}{\sqrt{2}})\sin\beta\\\\=\frac{1}{\sqrt{2}}(\cos\beta +\sin\beta)\\\\\sin^2(\frac{3\pi}{4}-\beta)=\frac{1}{2}\cos\beta +\sin\beta)^2=\frac{1}{2}(\cos^2\beta +\sin^2\beta+2\sin\beta\cos\beta\\=\frac{1}{2}(1+\sin2\beta)=\frac{1}{2}(1-\frac{1}{5}) = \frac{2}{5}\\

Use \cot^2x=\csc^2x-1=\frac{1}{\sin^2x}-1

so

\cot^2(\frac{3\pi}{4}-\beta)=\frac{1}{\sin^2(\frac{3\pi}{4}-\beta)}-1 = \frac{1}{\frac{2}{5}}-1=\frac{5}{2}-1=\frac{3}{2}

7 0
2 years ago
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melomori [17]

Answer:

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Step-by-step explanation:

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x^{2}-2x-3=12

You must make the equation equal to zero, as following:

x^{2}-2x-3-12=0

Add like terms:

 x^{2}-2x-15=0

Now, to factor the equation, you must find two numbers whose sum is -2 and whose product is -15. Therefore, you have:

(x-5)(x+3)=0\\x_1=5\\x_2=-3

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