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aksik [14]
3 years ago
6

Hey what do you get when you add 3 1/2 and 1/2?

Mathematics
1 answer:
vovikov84 [41]3 years ago
7 0
5/2 that is the answer
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Wich algebraic expression represents ”forty times a number”?<br><br> 40+n<br> 40n<br> n-40<br> 40/n
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The answer to the problem is 40n
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5) In the figure, triangle ABC is a right triangle at B. If CD = 15, find BC to the nearest tenth.
ycow [4]

Answer:

BC ≈ 4.0

Step-by-step explanation:

∠ DCA = 180° - 70° = 110° ( adjacent angles )

∠ DAC = 180° - (30 + 110)° ← sum of angles in triangle

∠ DAC = 180° - 140° = 40°

Using the Sine rule in Δ ACD to find common side AC

\frac{AC}{sin30} = \frac{15}{sin40} ( cross- multiply )

AC × sin40° = 15 × sin30° ( divide both sides by sin40° )

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Using the cosine ratio in right triangle ABC

cos70° = \frac{adjacent}{hypotenuse} = \frac{BC}{AC} = \frac{BC}{11.668} ( multiply both sides by 11.668 )

11.668 × cos70° = BC , then

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6 0
3 years ago
2÷ 2/5<br> I need help on this
PIT_PIT [208]

Answer:

5

Step-by-step explanation:

keep, change, flip

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2/1  x  5/2

10/2

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Whats 5-2y=3x in standard form?
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5-2y=3x \\\\3x+2y=5

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Jane and Sali cycled along the same 63km route. Jane took 3.5 hours to cycle the 63km.
Arisa [49]

Answer:

sali's speed was 18.75 km/h

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Jane took 3.5 hours to cycle the 63 km.

As,   , so the speed of Jane will be:  

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Sali caught up with Jane when they had both cycled 30 km.

So, the time required for Jane to cycle 30 km  and the time required for Sali to cycle 30 km  

Given that, Sali started to cycle 4 minutes or  after Jane started to cycle. So, the equation will be.......

5 0
3 years ago
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