Mathematics: In the following equations, let x=−3 and y=2/3. determine whether the following equations are true, false, or neither true nor false. 7. xy =−2 8. x+3y=−1 9. x+z=4 10. 9y=−2xx 11. y/x=−2

In the following equations, let x=−3 and y=2/3.

jasperc2002owy5b5

07.01.2022

(7) True

(8) true

(9) Neither true nor false

(10) False

(11) False

Step-by-step explanation:

We have given x = -3 and $y=\frac{2}{3}$

We have to find that the expression given bellow is true or false

(7) xy= -2

So $-3\times \frac{2}{3}=-2$

Hence it is true

(8) x+3y=-1

$-3+3\times \frac{2}{3}=-3+2=-1$

Hence it is true

(9) x+z = 4

We have not given value of z so we can say that it is true or false

So it is neither true nor false

(10) 9y=-2x^2

So $9\times \frac{2}{3}=-2\times (-3)^2$

6=-18

Hence it is not true

(11) $\frac{y}{x}=-2$

$\frac{y}{x}=\frac{\frac{2}{3}}{-3}=\frac{-2}{9}$

Hence it is false

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NetherisIsTheQueen

05.08.2022

x = 10

Step-by-step explanation:

After your second step, simplify the result:

$x=\dfrac{6}{3}\cdot\dfrac{5}{1}=2\cdot 5\\\\x=10$

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