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3 years ago

15

Pls help me Shawty’s

1 answer:

nevsk [136]3 years ago

3 0

Answer Madam Gazelle

Step-by-step explanation:

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Which equation represents direct variation?<br> A) y=3x<br> B) yx=3<br> C)y=3x^2<br> D) y=3x^3

geniusboy [140]

A) y=3x hope this helps

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2 years ago

How many milliliters are in 12 teaspoons? 1tsp=5ml

dusya [7]

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There are 59.147 millimeters in 12 teaspoons!

Step-by-step explanation:

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3 years ago

I’m timed plsss answer correctly I’ll mark u brainliest

Artemon [7]

Answer:

$\sqrt{125}$

Step-by-step explanation:

Use Pythagorean theorem since you have a right triangle $15^{2}$ = $10^{2} + x^{2}$

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2 years ago

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The perimeter of the square below is 36 yards. What is the length of each side? <br> yards

Inessa05 [86]

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9 yards

Step-by-step explanation:

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2 years ago

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A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks along the x-axis from the spotlight toward the bui

Sedbober [7]

Answer:

0.675 m/s

Step-by-step explanation:

Let height of shadow= y,CD=x

Height of man=2 m

Speed of man= $\frac{dx}{dt}=1. 8 m/s$

$\triangle ABD\sim\triangle ECD$

Therefore, $\frac{AB}{EC}=\frac{BD}{CD}$

$\frac{y}{2}=\frac{12}{x}$

$xy=24$

Differentiate w.r.t t

$x\frac{dy}{dt}+y\frac{dx}{dt}=0$

$x\frac{dy}{dt}=-y\frac{dx}{dt}$

$\frac{dy}{dt}=-\frac{y}{x}\frac{dx}{dt}$

When the man is 4 m from the building

Then, we have x=12-4=8 m

$\frac{dx}{dt}=1.8 m/s$

Substitute the values in above equation then, we get

$8y=24$

$y=\frac{24}{8}=3$

Substitute the values then we get

$\frac{dy}{dt}=-\frac{3}{8}\times 1.8=-0.675 m/s$

Hence, the length of his shadow on the building decreasing at the rate 0.675 m/s.

8 0

3 years ago