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2 years ago

Does the graph represent a function and if so, why?

Mathematics

1 answer:

hichkok12 [17]2 years ago

6 0

Answer:

Step-by-step explanation:

Definition of a function is: a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output

Here we have more than one output for one input:

x=-1 => y= -1, 0, 1
x= 1 => y= 1, 2, 3

So this is not a function

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2 years ago

X-5y=2 and 9x+8=15 solve by substitution

lozanna [386]

$x-5y=2$
Hence $x=2+5y$ (Equation I)
$9x+8=15$ (Equation II)
Substituting Equation I in Equation II
$9(2+5y)+8=15$
$18+45y+8=15$
$26+45y=15$
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Hence $y= - \frac{11}{45}$

Substituting this in Equation in I to get X

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2 years ago

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2 years ago

Can someone answer theese 3 questions

RSB [31]

Answer:

Which three questions?

Step-by-step explanation:

I've answered this first question, I guess I need two more...

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1 year ago

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andrew-mc [135]

Answer:

x = 5

Step-by-step explanation:

These triangles are similar, so they are in proportion to each other. Because of this we can say $\frac{2.5}{3.5}$ (the lengths of the vertical sides) = $\frac{x}{7}$ (the lengths of the hypotenuses). If we solve by cross-multiplying the numbers and then dividing we get x = 5.

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