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Damm [24]
3 years ago
14

Actual distance if scale is 1inch:30miles but distance between two cities is 2.5 inches

Mathematics
1 answer:
Bumek [7]3 years ago
3 0

Answer:

75 miles

Step-by-step explanation:

cross multiply

1/30 = 2.5/x

x= 2.5 * 30

x=75

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Prove that root3 (cosec (20))-sec (20)=4
Tems11 [23]
Root 3 /sin 20 - 1/cos 20

= (root3 cos 20 - sin 20 )/ (sin 20 cos 20)
(multiplying and dividing by 2)
=  2* (root3/2 cos 20 -1/2 sin 20)/ (sin 20 cos 20)

now sin 20 cos 20  = (2 sin 20 cos 20)/2 = (sin 40)/2
and writing root3/2 = sin 60, 1/2 = cos 60

= 2* (sin 60 cos 20 - cos 60 sin 20)/ (sin 40)/2

= 4* (sin (60-20))/sin 40

= 4* (sin 40)/sin 40
=4

Ask if any doubt in any step :)
7 0
3 years ago
Read 2 more answers
The 2nd pic is question #1. if i made a mistake in that feel free to correct me
max2010maxim [7]

Answer:

  • A. x² + 4

Step-by-step explanation:

<u>The second picture has:</u>

  • 1 + 4 = 1² + 4
  • 4 + 4 = 2² + 4
  • 9 + 4 = 3² + 4

<u>The pattern is:</u>

  • y = x² + 4

Correct option is A

3 0
3 years ago
I need help with this. ASAP
Margaret [11]
The answer in 4,000.
4 0
3 years ago
Read 2 more answers
4. The ordered pair (-2,-1) is a solution to which
ioda

C

4(-2) - y = -7

-8 -y = -7

-y =-7 +8

y= -1

8 0
2 years ago
Is <img src="https://tex.z-dn.net/?f=2%5E%7B-3%7D" id="TexFormula1" title="2^{-3}" alt="2^{-3}" align="absmiddle" class="latex-f
TEA [102]

Answer:

Rational

Step-by-step explanation:

2^{-3} simplifies to \frac{1}{8}.

Therefore, it is rational.

2^{-3}\\\\\text {Apply negative exponent rule: } a^{-n} = \frac{1}{a^n} \\2^{-3}= \frac{1}{2^3}\\ \rightarrow 2^3 = 2*2*2=8\\\boxed{2^{-3}=\frac{1}{8}}

<em>Brainliest Appreciated. </em>

5 0
3 years ago
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