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3 years ago

Find z for the following proportion: z/9= 2/3

1 answer:

4 0

Cross multiplication will help find the value of x
$\frac{z}{9} = \frac{2}{3} 


$
9*2=18
3*z=3z

Now we have :
3z=18
Divide both sides by 3 to isolate z

Final answer: z=6

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PLEASE HELP ASAP AND THANKS Find x

baherus [9]

Answer:

The value of x is 2.

Step-by-step explanation:

First, you have to make the left side into 1 fraction by making the denorminator the same :

$\frac{x}{x - 2} + \frac{1}{5}$

$= \frac{5x}{5(x - 2)} + \frac{x - 2}{5(x - 2)}$

$= \frac{5x + x - 2}{5(x - 2)}$

$= \frac{6x - 2}{5(x - 2)}$

Then you have to do cross multiplication :

$\frac{6x - 2}{5(x - 2)} = \frac{2}{x - 2}$

$(6x - 2)(x - 2) = 5(2)(x - 2)$

$6 {x}^{2} - 12x - 2x + 4 = 10x - 20$

$6 {x}^{2} - 14x + 4 = 10x - 20$

$6 {x}^{2} - 14x + 4 - 10x + 20 = 0$

$6 {x}^{2} - 24x + 24 = 0$

$6( {x}^{2} - 4x + 4) = 0$

${x}^{2} - 4x + 4 = 0$

${x}^{2} - 2x - 2x + 4 = 0$

$x(x - 2) - 2(x - 2) = 0$

$(x - 2)(x - 2) = 0$

$x = 2$

5 0

3 years ago

-90d = 9 What is d??

qaws [65]

D= -10
explanation:
-90/9=-10

8 0

3 years ago

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Find the vertex of the parabola whose equation is y=x^2+6x+2

SVETLANKA909090 [29]

(-3, 2) because you take the derivative and youll get y'=2x+6 then solve for x and that is -3 then put -3 in the original equation and you get 2

7 0

3 years ago

Of the following sets, which numbers in {1, 2, 3, 4, 5} make the inequality 3x + 1 > 4 true?

Kazeer [188]

The answer is 2,3,4,5 hope that helps

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3 years ago

Please help me I don’t understand

Brilliant_brown [7]

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3 years ago

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