3 years ago

5. Test the following statement to see if it is reversible. If so, choose the true biconditional.

Mathematics

1 answer:

Step2247 [10]3 years ago

8 0

Answer: I think the answer is D. Planes are parallels if and only if they don not intersect, hope this helps!!

Step-by-step explanation:

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Help me: solve the simultaneous equation y-2x= -8 and x²- 3x - y = 2

Serjik [45]

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(2,-4) And (3,-2)

Step-by-step explanation:

Here we have to solve one linear equation and a quadratic equation.

First we find the value of y in terms of x from linear equation and then substitute this value in our quadratic equation to solve it for x , Let us see how :

we have y-2x=8

y=2x-8

Now we substitute this in $x^2-3x-y=2$

Hence we have

$x^2-3x-(2x-8)=2\\x^2-3x-2x+8=2\\x^2-5x+8=2\\x^2-5x+8-2=0\\x^2-5x+6=0\\x^2-2x-3x+6=0\\x(x-2)-3(x-6)=0\\(x-2)(x-3)=0\\$

Thus we have

either (x-2)= 0 or (x-3)=0

or x=2 or x=3

Now let us find the value of y by substituting them in y=2x-8 one by one.

y=2(2)-8= 4-8=-4

y+2((3)-8=6-8=-2

Hence our coordinates are

(2,-4) and (3,-2)

8 0

3 years ago

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