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2 years ago

ANSWER QUICK! BRAINLIEST IF RIGHT!

Mathematics

2 answers:

erik [133]2 years ago

8 0

Let another angle be x

According to angle sum property

$\\ \rm\Rrightarrow x+35+78=180$

$\\ \rm\Rrightarrow x+113=180$

$\\ \rm\Rrightarrow x=180-113$

$\\ \rm\Rrightarrow x=67°$

Solnce55 [7]2 years ago

4 0

67°, every triangle equals 180° so add together 35+78 which equals 113. subtract 180-113 and get 67!

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Naya [18.7K]

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Step-by-step explanation:

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3 years ago

A street light is at the top of a 25 ft pole. A 4 ft tall girl walks along a straight path away from the pole with a speed of 6

Burka [1]

Answer:

Tip of the shadow of the girl is moving with a rate of 7.14 feet per sec.

Step-by-step explanation:

Given : In the figure attached, Length of girl EC = 4 ft

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To Find : Rate ( $\frac{dw}{dt}$ ) of the tip (D) of the girl's shadow (BD) moving away from th

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In the figure attached, ΔAFE and ΔADE are similar.

By the property of similar triangles,

$\frac{x}{21}=\frac{x+y}{25}$

25x = 21(x + y)

25x = 21x + 21y

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y = $\frac{4x}{21}$

Now we take the derivative on both the sides,

$\frac{dy}{dt}=\frac{4}{21}\times \frac{dx}{dt}$

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= $\frac{8}{7}$

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Since w = x + y

Therefore, $\frac{dw}{dt}= \frac{dx}{dt}+\frac{dy}{dt}$

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3 years ago

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Step-by-step explanation:

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3 years ago

Read 2 more answers

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Xelga [282]

Answer:

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