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3 years ago

Can somebody help me with social studies please?

Mathematics

1 answer:

Nana76 [90]3 years ago

7 0

Sure, what grade are you in and what are the questions about?

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4/7 is the result when 1/2 and ex are added what is the value of X

Margaret [11]

Answer:

honestly im trying to figure it out right now will get back to you when i figure it out.

Step-by-step explanation:

6 0

3 years ago

In a scaled drawing the width of a sofa is 15 centimeters The width of the actual sofa is 150 centimeters. What is the scale of

Delvig [45]

The scale of the drawing is 10x smaller compared to the one in real life

8 0

3 years ago

Find the solution of the problem (1 3. (2 cos x - y sin x)dx + (cos x + sin y)dy=0.

lakkis [162]

Answer:

$2*sin(x)+y*cos(x)-cos(y)=C_1$

Step-by-step explanation:

Let:

$P(x,y)=2*cos(x)-y*sin(x)$

$Q(x,y)=cos(x)+sin(y)$

This is an exact differential equation because:

$\frac{\partial P(x,y)}{\partial y} =-sin(x)$

$\frac{\partial Q(x,y)}{\partial x}=-sin(x)$

With this in mind let's define f(x,y) such that:

$\frac{\partial f(x,y)}{\partial x}=P(x,y)$

and

$\frac{\partial f(x,y)}{\partial y}=Q(x,y)$

So, the solution will be given by f(x,y)=C1, C1=arbitrary constant

Now, integrate $\frac{\partial f(x,y)}{\partial x}$ with respect to x in order to find f(x,y)

$f(x,y)=\int\ 2*cos(x)-y*sin(x)\, dx =2*sin(x)+y*cos(x)+g(y)$

where g(y) is an arbitrary function of y

Let's differentiate f(x,y) with respect to y in order to find g(y):

$\frac{\partial f(x,y)}{\partial y}=\frac{\partial }{\partial y} (2*sin(x)+y*cos(x)+g(y))=cos(x)+\frac{dg(y)}{dy}$

Now, let's replace the previous result into $\frac{\partial f(x,y)}{\partial y}=Q(x,y)$ :

$cos(x)+\frac{dg(y)}{dy}=cos(x)+sin(y)$

Solving for $\frac{dg(y)}{dy}$

$\frac{dg(y)}{dy}=sin(y)$

Integrating both sides with respect to y:

$g(y)=\int\ sin(y) \, dy =-cos(y)$

Replacing this result into f(x,y)

$f(x,y)=2*sin(x)+y*cos(x)-cos(y)$

Finally the solution is f(x,y)=C1 :

$2*sin(x)+y*cos(x)-cos(y)=C_1$

7 0

4 years ago

If 20.24 is the bill and Michael and Imani add an 18% tip to the bill, what does their lunch cost in total? Enter your answer in

asambeis [7]

20.24 + 3.6432 = 23.8832

3 0

4 years ago

Model of car driven… is it qualitative or quantitative?

xz_007 [3.2K]

Answer:

ok so

Step-by-step explanation:

ok so if theres numbers its qualitative if it has to do with how it drives is quantitative

4 0

3 years ago