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yawa3891 [41]
3 years ago
11

Trong kho có các sợi dây thép dài 100cm. Chú thợ cần cắt mỗi sợi dây đó thành 3 loại dây có độ dài: 5dm, 20cm, 10cm để đan thành

các tấm lưới. Em hãy chỉ cho chú cách cắt tiết kiệm nhấ
Mathematics
1 answer:
Bezzdna [24]3 years ago
4 0

Answer:

20

Step-by-step explanation:

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The polar form of this is?
prohojiy [21]

Answer:

2, 120 degrees

Step-by-step explanation:

The first step in finding the polar form is finding the modulus, r

r= sqrt( x^2 + y^2)

r = sqrt( (-1)^2 + sqrt(3)^2)

r = sqrt(1+3)

r= sqrt(4)

r =2


The next step is finding the angle

theta = arctan (y/x)

theta = arctan (sqrt(3)/-1))

theta = arctan (-sqrt(3))

theta = -60


The point (-1, sqrt(3)) is in the 2nd quadrant, but our angle is in the 4th quadrant, so we add 180 degrees

theta = -60 + 180 = 120

theta = 120 degrees

6 0
3 years ago
Write an equation in slope-intercept form for the line with slope −2/3 and y-intercept 2.
Damm [24]

Answer:

\huge\boxed{\sf y = -\frac{2}{3}x + 2 }

Step-by-step explanation:

Slope = m = -2/3

y-intercept = b = 2

<u>Slope-intercept equation/form:</u>

y = mx + b

y = -2/3 x + 2

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3><h3>Peace!</h3>
7 0
3 years ago
Which equation could be used to find the height of the flagpole?
Andrew [12]
Given a fragpole which makes a right angle with the point of observation with the angle of elevation as 50°.

Let x be the height of the flagpole, then

\sin50^o= \frac{x}{5}

Therefore, the <span>equation that could be used to find the height of the flagpole is
</span><span>x/5 = sin 50</span>
6 0
3 years ago
A piano has 88 keys. Fifty-two of the keys are white.
Tcecarenko [31]

Answer:

36

Step-by-step explanation:

88 - 52

=36

8 0
3 years ago
Help and fast
kolbaska11 [484]

Answer:

3 cm base, 6 cm height

Step-by-step explanation:

base is already labeled and the height is as well

3 0
4 years ago
Read 2 more answers
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