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alex41 [277]
3 years ago
15

Uh please help me solve these Geometry questions fast! 20pts

Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
8 0

Step-by-step explanation:

question:1? 12ft question:2? 6ft question: 3? 2.4ft or 2 2/5 ft question:4? p=9.6m;A=5.76m^2 questions:5?p=2×+20; A=7×+21 question:6? circumference Question:7? c=44mi

A=154mi^2

question:8? c=9.42cm

A=7.065cm^2

question:9? c=2~(×+1)

a=~(×^2+2×+1)

question:10? 2in

question:11? 19m

question:12? 12.5mm

question:13? 7.5ft

question:14? 42ft^2

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Convert the angle \theta=260^\circθ=260
mel-nik [20]

Question:

Convert the angle θ=260° to radians.

Express your answer exactly.

θ = ___ radians

Answer:

260° = 13π/9 or 4.54 rad

Step-by-step explanation:

Given

θ=260°

Required

Convert from degree to radians

To convert an angle in degrees to radians, we simply follow the steps below.

1° = 1 * π/180 rad

Replace the 1° with x

So,

x° = x * π/180 rad.

Now, we assume that x = 260

This means that we substitute 260 for x. This gives

260° = 260 * π/180

260° = 260π/180

Divide numerator and denominator by 20

260° = 13π/9

We can leave the answer in this form or solve further.

Take π as 22/7. This gives

260° = 13/9 * 22/7

260° = 286/63

260° = 4.5396825397

260° = 4.54 rad (Approximated)

3 0
3 years ago
A swimming pool is 20 feet wide and 40 feet long. If it is surrounded by a walkway of square tiles, each is 1 foot by 1 foot, ho
Lena [83]

Answer:

124 tiles

Step-by-step explanation:

2(20+40)

2(60)

120+4=124

5 0
3 years ago
I need helping solving -3z+7=-7-10z
Tpy6a [65]
-3z + 7 = -7 - 10z

Add 10z to both sides

7z + 7 = -7

Subtract 7 from both sides

7z = -14

Divide by 7

Z = -2
8 0
4 years ago
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rusak2 [61]

tan2x*cotx - 3 = 0

We know that: tan2x = sin2x/cos2x and cotx = cosx/sinx

==> sin2x/cos2x *cosx/sinx = 3

Now we know that sin2x = 2sinx*cosx

==> 2sinxcosx/cos2x * cosx/sinx = 3

Reduce sinx:

==> 2cos^2 x/ cos2x = 3

Now we know that cos2x = 2cos^2 x-1

==> 2cos^2 x/(2cos^2 x -1) = 3

==> 2cos^2 x = 3(2cos^2 x -1)

==> 2cos^2 x = 6cos^2 x - 3

==> -4cos^2 x= -3

==> 4cos^2 x = 3

==> cos^2 x = 3/4

==> cosx = +-sqrt3/ 2

<span>==> x = pi/6, 5pi/6, 7pi/6, and 11pi/6</span>

3 0
3 years ago
What is 12925 rounded to the nearest ten thousand
otez555 [7]
Your answer is 13,000
because the 9 is closer to the next digit than to 0
6 0
3 years ago
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