2 years ago

Giving brainlist to whoever answers

Mathematics

1 answer:

SpyIntel [72]2 years ago

3 0

Answer:

144m2

Step-by-step explanation:

I think very carefully on my brain is it cirrect?

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Through: (2, 2), slope = 3<br> 1) y = 4x + 4 B) y = 4x – 4<br> *) y = 3r – 4 D) y = - 4x – 4

geniusboy [140]

Answer:

*) y = 3r-4

Step-by-step explanation:

3=6-4

6 0

2 years ago

Describe 2 ways to find the area of the shaded rectangle

sweet-ann [11.9K]

Calculate the area of both shapes. The area of a rectangle is determined by multiplying its length times its width. The area of a circle is Pi (i.e., 3.14) times the square of the radius. Find the area of the shaded region by subtracting the area of the small shape from the area of the larger shape.

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2 years ago

An air traffic controller spots two airplanes at the same altitude converging to a point as they fly at right angles to each oth

muminat

So.... notice the picture below

we know when y = 140 and x = 240, r = 250

so let's use the pythagorean theorem

$\bf r^2=x^2+y^2\implies 2r\cfrac{dr}{dt}=2x\cfrac{dx}{dt}+2y\cfrac{dy}{dt}\implies \cfrac{dr}{dt}=\cfrac{x\frac{dx}{dt}+y\frac{dy}{dt}}{r}
\\\\\\
\cfrac{dr}{dt}=\cfrac{240\cdot 480+70\cdot 140}{250}\implies \cfrac{dr}{dt}=500$

now... how much time does the controller have? well, say, plane "y" is going at dy/dt of 140mph, and is 70 miles away, 140 is 2*70, so it can cover those 70 miles in 1/2 hr, and when it does, it'll collide with the other,

so, the controller has that much, less than 1/2 hr