All categories

2 years ago

Look at image below urgant 1000 points alert

Mathematics

2 answers:

shtirl [24]2 years ago

8 0

A = pi x r x l

= 3.14 x 5 x 13

= 204.1

Ratling [72]2 years ago

8 0

Answer:

282.7 mi^2

Step-by-step explanation:

Surface area of cone=pi*r*(r+l)=pi*5*18=282.7

You might be interested in

PLEASE HELP ASAP! FINDING SLOPE!

stepan [7]

The answer is a because it has a negative slope and to find it i did rise over run it rises one block for every four it goes over

5 0

3 years ago

A plumber charges $25 for a service call plus $50 per hour for service. Write a linear equation in slope-intercept form to repre

Reptile [31]

Answer:

y= $50x + $25

Step-by-step explanation:

Slope-intercept form is y=mx+b

x is something that is constant

b is something you add on to the constant

5 0

3 years ago

Three consecutive integers have a sum of 78. find the inte

VMariaS [17]

Let the 3 numbers be x,x+1,x+2
Given sum of those 3 consecutive integers are 78
X+x+1+x+2=78
3x+3=78
3(x+1)=78
X+1=26
X=26-1
X=25

Therefore the numbers are 25,26,27

5 0

3 years ago

Read 2 more answers

What would the correct answer be???

tiny-mole [99]

Answer:

8.27837797

I think this is correct im not completely sure.

8 0

3 years ago

Find a linear second-order differential equation f(x, y, y', y'') = 0 for which y = c1x + c2x3 is a two-parameter family of solu

Alisiya [41]

Let $y=C_1x+C_2x^3=C_1y_1+C_2y_2$ . Then $y_1$ and $y_2$ are two fundamental, linearly independent solution that satisfy

$f(x,y_1,{y_1}',{y_1}'')=0$
$f(x,y_2,{y_2}',{y_2}'')=0$

Note that ${y_1}'=1$ , so that $x{y_1}'-y_1=0$ . Adding $y''$ doesn't change this, since ${y_1}''=0$ .

So if we suppose

$f(x,y,y',y'')=y''+xy'-y=0$

then substituting $y=y_2$ would give

$6x+x(3x^2)-x^3=6x+2x^3\neq0$

To make sure everything cancels out, multiply the second degree term by $-\dfrac{x^2}3$ , so that

$f(x,y,y',y'')=-\dfrac{x^2}3y''+xy'-y$

Then if $y=y_1+y_2$ , we get

$-\dfrac{x^2}3(0+6x)+x(1+3x^2)-(x+x^3)=-2x^3+x+3x^3-x-x^3=0$

as desired. So one possible ODE would be

$-\dfrac{x^2}3y''+xy'-y=0\iff x^2y''-3xy'+3y=0$

(See "Euler-Cauchy equation" for more info)

6 0

3 years ago