An equivalent system of equation is found by adding or subtracting the second equation or when any multiple of both equations are added or subtracted to each other.

Let us see part by part.

8 0

4 years ago

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15×2×4 helppppppppppppppppp plzzzzzzzzzzzzzzzzzzzz

olasank [31]

Answer:

120

Step-by-step explanation:

We can break it up and then solve. 15*2 is 30. 30*4 is 120.

3 0

3 years ago

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How do you solve: f(x) = -x2e-x +2xe-x , finding the zero's of f.

Maksim231197 [3]

Answer:

0 and 2

Step-by-step explanation:

$f(x) = -x^2e^{-x}+2xe^{-x}$

To find zeros set f(x)=0 and solve for x

$0 = -x^2e^{-x}+2xe^{-x}$

$0 = -e^{-x}(x^2-2x)$

now factor out x

$0 = -xe^{-x}(x-2)$

set each factor =0 and solve for x

$x=0$

$-e^{-x}=0$ no solution for x

$x-2=0, x=2$

zeros of f are 0 and 2

7 0

4 years ago