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3 years ago

What is the answer please help me no links

Mathematics

1 answer:

Elan Coil [88]3 years ago

3 0

Answer:

C= 2.18x + 2.39

Step-by-step explanation:

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I'm not sure how to do these equations

Gennadij [26K]

$\frac{x^2+4x+3}{x^2-4x-21} = \frac{(x+3)(x+1)}{(x+3)(x-7)} = \frac{x+1}{x-7}$
$\frac{x^2+10x+16}{x^2+13x+40} = \frac{(x+8)(x+2)}{(x+8)(x+5)} = \frac{x+2}{x+5}$

5 0

4 years ago

Use differentials to estimate the amount of material in a closed cylindrical can that is 60 cm high and 24 cm in diameter if the

alexira [117]

Answer:

$dV=542.9 cm^{3}$

Step-by-step explanation:

Let's start with the equation of the volume of a cylinder:

$V=\pi r^{2}*h$

Where:

r is the radius of the cylinder (r=D/2=24/2=12 cm)
h is the high of the cylinder (h = 60 cm)

We can us partial derivatives to find the differential of this volume. So we will have:

$dV=\frac{\partial V}{\partial r}dr+\frac{\partial V}{\partial h}dh$ (1)

Now:

$\frac{\partial V}{\partial r}=2\pi r*h=2\pi 12*60=4523.9 cm^{2}$

$\frac{\partial V}{\partial h}=\pi 12^{2}=452.4 cm^{2}$

dr is a differential of the radius, so in our case it is 0.1 cm and dh, differential of the high, is 0.1*2 cm. We multiply by 2 because we need to consider the top and the bottom of the cylinder.

Now we just need to put all of this definitions in the equation (1).

$dV=4523.9*0.1+452.4*0.2=542.9 cm^{3}$

I hope it helps you!

6 0

4 years ago

How are rates and ratios related

Dovator [93]

Rates are the percentage and ratios are like this 3:1. so, in that 3:1 ratio, there is 3 to 1 cookies to cups of milk. So there is 75% cookies and 25% milk.

I hope i helped you, comment and ill answer

7 0

4 years ago

Read 2 more answers

A. True/False

ra1l [238]

Answer:

True

Step-by-step explanation:

$x^{2} -6x=9$

subtract $9$ from both sides

$x^{2} -6x-9$

<em>plz mark me brainliest.</em> ;)

5 0

3 years ago

I am bad at geometry please help

VashaNatasha [74]

Answer:

3.9 in^2

Step-by-step explanation:

Split it up into a top rectangle and a bottom rectangle. Find the area of the top rectangle and subtract the combined area of the two quarter circles.

The area of the rectangle is 6 * 3 = 18. The area of the two quarter circles is the same as the area of one semicircle, and since the radius is 3 you can do:

3^2 * pi / 2 = 9pi/2. As a decimal this would be: 14.14.

Then, you can do rectangle - circle = 18 - 14.14 = 3.86. Rounded to the nearest tenth, this is 3.9

4 0

3 years ago