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3 years ago

If y varies directly as x and x= 15 when y = 5, find x when y= 9

Mathematics

1 answer:

dalvyx [7]3 years ago

7 0

Answer:

x = 27

Step-by-step explanation:

x = y x 3.

5 = y, x = 15.

5 x 3 = 15.

y = 9.

9 x 3 = 27.

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Hunter-Best [27]

Hi there!

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Hope this helps!

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3 years ago

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2 years ago

If h (x) = {(-2,3), (0,4), (1,6), (2, 9)}<br><br> then what set of values represent h-1 (x) ?

vfiekz [6]

Answer:

$h^{-1}(x)=\{(3,-2),(4,0),(6,1),(9,2)\}$

Step-by-step explanation:

Given: $h(x)=\{(-2,3),(0,4),(1,6),(2,9)\}$

To find: $h^{-1}(x)$

Solution:

A relation is said to be a function if each and every element of the domain has a unique image in the co-domain.

Inverse of a function exist if it is both one to one and onto.

$h(x)=\{(-2,3),(0,4),(1,6),(2,9)\}$

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7 0

2 years ago

If f(x) = 3x +9 x when f(x) = 30

den301095 [7]

Answer:

$x=5/2$

Step-by-step explanation:

When $f(x)=30$ , we have $3x+9x=30$ .

Combining like terms on the right side, we have $12x=30$ .

Finally, dividing by $12$ we get $x=30/12$ .

We note that $30=6*5$ and $12=6*2$ , so $30/12=5/2$ .

So, $\boxed{x=5/2}$ and we're done!

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2 years ago

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PSYCHO15rus [73]

Answer:

Step-by-step explanation:

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2 years ago