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vredina [299]
3 years ago
8

Simplify the expession 3.7 - 1.8 - 3.67 + 4.4 - 1.34

Mathematics
2 answers:
Firdavs [7]3 years ago
8 0
<span>3.7 - 1.8 - 3.67 + 4.4 - 1.34 = </span>1.29
antoniya [11.8K]3 years ago
3 0
The answer to this would be 1.29

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If the square of twice a number is 81, what is the number? I tried doing 2x^2=81 but that did not come out to the answer 4.5,-4.
Vlada [557]
If the number is n then

square of 2 times a number
square of 2n
(2n)²
that was your mistake, because (2n)²=4n², not 2n²

the result is 81
(2n)²=81
square root both sides
remember positive and negative roots
2n=+/-9
divide by 2
n=+/-4.5

n=4.5 or -4.5
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Step-by-step explanation:

5 0
2 years ago
2 intersecting lines are shown. A line with point T, R, W intersects a line with points S, R, V at point R. Clockwise, from the
Mademuasel [1]

Answer:

The measure of angle TRV is 130° ⇒ last answer

Step-by-step explanation:

* <em>According to the attached graph</em>

- Line TRW intersects line SRV at point R

- The measure of angle VRT is (2x + 10)°

- The measure of angle VRW is (x - 10)°

- We need to find measure of angle TRV

- <em>From the attached figure</em>

∵ T , R , W lie on the same line

∴ ∠TRW is a straight angle

- The measure of the straight angle is 180°

∴ m∠TRW = 180°

∵ ∠TRW contains ∠VRT and ∠VRW

∴ m∠VRT + m∠VRW = m∠TRW

∴ m∠VRT + m∠VRW = 180°

∵ m∠VRT = (2x + 10)°

∵ m∠VRW is (x - 10)°

∴ 2x + 10 + x - 10 = 180

- Add like terms

∴ 3x = 180

- Divide both sides by 3

∴ x = 60

∵ m∠TRV = (2x + 10)°

- Substitute x by 60

∴  m∠TRV = 2(60) + 10 = 120 + 10 = 130°

∴ The measure of angle TRV is 130°

5 0
2 years ago
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Elanso [62]

Answer:

x=64°

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4 0
3 years ago
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Which of the following represents a major difference between the Incas and the Phoenicians?
max2010maxim [7]

Answer:

B

Step-by-step explanation:

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3 years ago
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