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Rama09 [41]
3 years ago
14

Which expression is equivalent to (8a-3b+7)-(2a+b-4)?

Mathematics
1 answer:
pogonyaev3 years ago
7 0
8a-3b+7-2a-b+4=6a-4b+11
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What is the difference between 12/8 and 3/4?
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(12/8) and (3/4) = 2 1/4 or 2.25 decimal thus: A:

Step-by-step explanation:

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X-1/4x^2+7x+3 divided by 2x^2+4x-6/4x^2+11x+6
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You pretty much just flip the second fraction and factor 

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Find the measure of the missing angle.
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36 degrees

Step-by-step explanation:

The whole shape is 90 degrees.

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Two people are standing on opposite sides of a hill. Person A makes an angle of elevation of 65° with the top of the hill and pe
8090 [49]

Answer:

Option 3. 71 ft. is the distance between B and top of the hill.

Step-by-step explanation:

Let the height of the hill is h ft and the distance of A from the hill be x ft and distance from B to hill is y.

It is given distance between A and B is 45 ft. ∠BAO = 65° and ∠ABO = 80°.

We have to find the distance of B from the top of the hill.

Now from ΔACO tan 65 = \frac{h}{45-x} = 2.14

h=2.14(45-x)

From ΔBCO tan80 = \frac{h}{x} = 5.67

h = 5.67x

Now h = 5.67x = 2.14(45-x)

5.67x = 96.3 - 2.14x

2.14x + 5.67x = 96.3

7.81x = 96.3

x = 96.3/7.81 = 12.33 ft

Therefore cos80 = \frac{x}{OB}

0.174 = \frac{12.33}{OB}

OB = \frac{12.33}{.174}=70.86=71ft.

Therefore 71 ft is the distance between B and the top of the hill.

3 0
3 years ago
THIS IS FOR THE SAME TEST IF YOU WANT TO HELP ILL GIVE 50 POINTS
katrin2010 [14]
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3 pages out of 650 is 0.5%
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2 years ago
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