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adoni [48]
2 years ago
5

Please help me i need help!

Mathematics
1 answer:
Lynna [10]2 years ago
6 0

For number 22:

7y=8x-14 ; y=6

Plugging in y, we get:

7*6 = 8x - 14

42 = 8x-14

56 = 8x

x = 7

Comparing answers, x is, indeed 7.

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Determine whether or not f is a conservative vector field. if it is, find a function f such that f = ∇f. (if the vector field is
gladu [14]

\mathbf f is conservative if we can find a scalar function f such that \nabla f=\mathbf f. This is equivalent to solving the system of PDEs,

\dfrac{\partial f}{\partial x}=2x-6y

\dfrac{\partial f}{\partial y}=-6x+10y-9

Integrate both sides of the first PDF with respect to x:

f(x,y)=x^2-6xy+g(y)

where g is some function independent of x. Then differentiatng with respect to y, we have

\dfrac{\partial f}{\partial y}=-6x+\dfrac{\mathrm dg}{\mathrm dy}=-6x+10y-9

\implies\dfrac{\mathrm dg}{\mathrm dy}=10y-9\implies g(y)=5y^2-9y+C

and so \mathbf f is indeed conservative, with

f(x,y)=x^2-6xy+5y^2-9y+C

3 0
3 years ago
Please help, and show work thank you :)
frosja888 [35]

Having a $75 added cost to the total price, we can presume they will never equal. It is easy to see if you make it algebraic:

m=months\\t=total\\\\ProviderA => t = 39.95m\\ProviderB => t = 39.95m+75

They will never equal each other.

3 0
3 years ago
Help me plz the answer is d right i dont reamber
Nat2105 [25]

Answer:

C. The total amount spent on drinks by Andrew.

Step-by-step explanation:

y itself would be the number of drinks purchased, and 2.5 is the cost. And since is is 2.5y then it represents the total amount.

8 0
3 years ago
How do i do this or what's the answer (there is a picture btw)
velikii [3]
AB is 6
BC is 4
CD is 6
DA is 8
A is 45degrees
B is 130dgrees
C is 130degrees
D is 45degrees (about)
5 0
3 years ago
Give in, interval notation, the unknown numbers in the following description. When 4 is added to twice a number, the result is g
lbvjy [14]
The answer is 8 hope this helps all u have to do is figure out what two numbers added togher give you 18
5 0
3 years ago
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