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3 years ago

What is the value of 3x2 - 5xy + 5y2 for x = -6 and y = 2?

2 answers:

8 0

I assume you mean:
3x^2 -5xy + 5y^2.

Simply substitute the given values into the equation:

3(-6)^2 - 5(-6)(2) + 5(2)^2

=188

Naily [24]3 years ago

6 0

-36 +60 =24+20=44 answer is 44 unless the first x is a multiplication sign

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0.35714285714 as a fraction?

Blababa [14]

As a fraction it is 357/1000.
Simplify that it is 7/20

4 0

3 years ago

Do anyone know what questions will be asked in the second DBA of geometry in flvs pls I need to know or I will ded

fomenos

Answer:

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3 years ago

Find the measure of CDE. The measure of CDE equals a certain # of degrees.

vredina [299]

2x-13+3x-8+2x-3+2x-7+3x-1+2x+11+2x+9= (7-2)×180

16x-12=(7-2)×180

(7-2)×180 Work this out on a calculator

And then that answer=16x-12

Then you solve by adding 12 both sides and dividing by 16 both sides to get what x is.

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3 years ago

Helpppppppp please i dont understand

RUDIKE [14]

Answer:

(a) 64 days

(b) 2 phones calls

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

Consider F and C below. F(x, y, z) = yz i + xz j + (xy + 6z) k C is the line segment from (2, 0, −2) to (5, 4, 2) (a) Find a fun

WITCHER [35]

Answer:

Required solution (a) $f(x,y,z)=xyz+3z^2+C$ (b) 40.

Step-by-step explanation:

Given,

$F(x,y,z)=yz \uvec i +xz\uvec j+(xy+6z)\uvex k$

(a) Let,

$F(x,y,z)=yz \uvec i +xz\uvec j+(xy+6z)\uvex k=f_x \uvec{i} +f_y \uvex{j}+f_z\uvec{k}$

Then,

$f_x=yz,f_y=xz,f_z=xy+6z$

Integrating $f_x$ we get,

$f(x,y,z)=xyz+g(y,z)$

Differentiate this with respect to y we get,

$f_y=xz+g'(y,z)$

compairinfg with $f_y=xz$ of the given function we get,

$g'(y,z)=0\implies g(y,z)=0+h(z)\implies g(y,z)=h(z)$

Then,

$f(x,y,z)=xyz+h(z)$

Again differentiate with respect to z we get,

$f_z=xy+h'(z)=xy+6z$

on compairing we get,

$h'(z)=6z\implies h(z)=3z^2+C$ (By integrating h'(z)) where C is integration constant. Hence,

$f(x,y,z)=xyz+3z^2+C$

(b) Next, to find the itegration,

$\int_C \vec{F}.dr=\int_C \nabla f. d\vec{r}=f(5,4,2)-f(2,0,-2)=(52+C)-(12+C)=40$

3 0

3 years ago