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3 years ago

Angle ABD is 90°.

Mathematics

2 answers:

yarga [219]3 years ago

7 0

Answer:

answer is 54. Since angleABD - angleCBD = angleABC

THEREFORE,. 90-36

Maksim231197 [3]3 years ago

6 0

Answer:

Step-by-step explanation:

368

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Sarah’s neighbor offers to pay her $5 for every shark tooth she finds on the beach. After collecting only three shark’s teeth, S

zlopas [31]

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3 years ago

A function f is defined by f(x) = 1 + 6x + x2 + 6x3 + x4 + ⋯ that is, its coefficients are c2n = 1 and c2n + 1 = 6 for all n ≥ 0

Alenkinab [10]

From the odd-degree terms, take out one copy and rewrite the series as

$1+6x+x^2+6x^3+\cdots=(1+x+x^2+x^3+\cdots)+5x+5x^3+\cdots$

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Then if |x| < 1, we can condense this to

$\displaystyle\sum_{n=0}^\infty x^n+5x\sum_{n=0}^\infty x^{2n}=\frac1{1-x}+\frac{5x}{1-x^2}=\frac{1+6x}{1-x^2}$

Since the series we invoked here converge on -1 < x < 1, so does this one.

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3 years ago

Two lighthouses A and B are 25km apart and A is due West of B. A submarine S is on a bearing of 137° from A and on a bearing of

andrezito [222]

Answer:

SA = 7.97 km

SB = 31.3 km

Step-by-step explanation:

Draw a picture of the triangle formed by the points A, B, and S.

∠SAB = 137°, and ∠ABS = 10°. Therefore, ∠ASB = 33°.

Using law of sines:

25 / sin 33° = x / sin 10°

x = 7.97

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y = 31.3

Round as needed.

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3 years ago

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zmey [24]

Answer:

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3 years ago

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mario62 [17]

The answer is 10 2/11. I hope this helps!

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3 years ago