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3 years ago

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Mathematics

2 answers:

Gre4nikov [31]3 years ago

8 0

The rate of change represents the depth of liquid every three square feet sprayed.

For every square foot of land, the depth decreases by 0.8 of an inch.

Hope this helps!

MatroZZZ [7]3 years ago

5 0

It was answered in the last question:

Rate of change = (21.4-19)/(0-3)=2.4/(-3) = -0.8 in of liquid / sq. ft

He's right. The previous answer was backwards. Now corrected.

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Gnoma [55]

Answer:

Step-by-step explanation:

D is the answer

7 0

3 years ago

Read 2 more answers

Write the equation of the circle with center (-4, 8) and passes through the point (-2, -1)

anzhelika [568]

Answer:

$(x+4)^2+(y-8)^2=85$

Step-by-step explanation:

The standard equation for a circle is given by:

$(x-h)^2+(y-k)^2=r^2$

Where (h, k) is the center and r is the radius.

We know that the center is (-4, 8). So, substitute -4 for h and 8 for k:

$(x-(-4))^2+(y-8)^2=r^2\\$

Simplify:

$(x+4)^2+(y-8)^2=r^2$

Now, we will need to find r.

We know that it passes through the point (-2, -1). So, we can substitute -2 for x and -1 for y and solve for r. So:

$(-2+4)^2+(-1-8)^2=r^2$

Evaluate:

$(2)^2+(-9)^2=r^2$

Square:

$4+81=r^2$

Add:

$r^2=85$

So, r squared is 85.

We don’t actually have to solve for r itself, since we will have to square it anyways.

So, we have:

$(x+4)^2+(y-8)^2=r^2$

Substituting 85 for r squared, we get:

$(x+4)^2+(y-8)^2=85$

And we have our equation.

8 0

3 years ago

In 3-8, find the missing side length of each right triangle. 50yd.<br> 30yd.

denis23 [38]

Hi! so you didn’t let us know which side length is missing and it kind of matters so i’ll attach an image so you can just copy the one that looks most like yours.