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2 years ago

11

Solve using the distributed property -4(2x-5)=4

2 answers:

finlep [7]2 years ago

8 0

-4(2x-5)=4

-8x+20=4

-8x=4-20

-8x/-8= -16/-8

x=2

Scorpion4ik [409]2 years ago

7 0

First you multiply -4 times 2x=-8x.
Then you multiply -4 and -5=20
so -8x+20=4
You subtract 20 on outside of the equal sign.(Because if you do something on one side of the equal sign you have to do it to the other side.)
-8x=-16
then you divide -8 on both sides of the equal sign
x=2

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WITCHER [35]

Answer:

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

Step-by-step explanation:

Given,

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(a) Let,

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

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

Differentiate this with respect to y we get,

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

Then,

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

Again differentiate with respect to z we get,

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

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Step-by-step explanation:

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