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Zolol [24]
2 years ago
6

Please help I don't understand ​

Mathematics
1 answer:
Bond [772]2 years ago
3 0

Answer:

mx+b

Step-by-step explanation:

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How do you write 1.25 into a fraction
kvasek [131]
25/100
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3 years ago
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Whats the length in meters of CD?​
Gnesinka [82]

Answer:

The length of DC in meters is  \frac{60}{13} ⇒ A

Step-by-step explanation:

In the circle O

∵ AB passing through O

∴ AB is a diameter

∵ D is on the circle

∴ ∠ADB is an inscribed angle subtended by arc AB

∵ Arc AB is half the circle

→ That means its measure is 180°

∴ m∠ADB = \frac{1}{2} × 180° = 90°

In ΔADB

∵ m∠ADB = 90°

∵ AD = 5 m

∵ BD = 12 m

→ By using Pythagorase Theorem

∵ (AB)² = (AD)² + (DB)²

∴ (AB)² = (5)² + (12)²

∴ (AB)² = 25 + 144 = 169

→ Take square root for both sides

∴ AB = 13 m

∵ ∠ADB is a right angle

∵ DC ⊥ AB

∴ DC × AB = AD × DB

→ Substitute the lengths of AB, AD, and DB

∵ DC × 13 = 5 × 12

∴ 13 DC = 60

→ Divide both sides by 13

∴ DC = \frac{60}{13} m

∴ The length of DC in meters is  \frac{60}{13}

6 0
2 years ago
In the triangle below x= ? cm. Round to the nearest tenth
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2 years ago
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sladkih [1.3K]

Answer:

a = 4/27 - b/54

Step-by-step explanation:

27a+1/2b=4

Subtract 1/2 b from each side

27a+1/2b - 1/2 b=4-1/2 b

27a = 4 - 1/2 b

Divide each side by 27

27a/27 = 4/27 - 1/2 b/27

a = 4/27 - b/54

5 0
2 years ago
Read 2 more answers
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