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3 years ago

ATTENTION

Mathematics

2 answers:

lakkis [162]3 years ago

5 0

<h2>▪Answer: Option D!</h2>

<h3>Explanation:</h3>

Given:

y = x +7
$y = {x}^{2} + 2x + 7$

<h2>Solution :</h2>

Substitute y=x + 7 in the second equation!

$y = {x}^{2} + 2x + 7$

$\implies \: x + 7 = {x}^{2} + 2x + 7$

$\implies \: {x}^{2} + 2x + 7 - x - 7 = 0$

$\implies \: {x}^{2} + x = 0$

$\implies \: x(x + 1) = 0$

 $\implies \: x = 0 \: or \: x = - 1$ 

Now put x = 0 in equation 1,

y = x +7

=> y = 0+7

=> y = 7

Now put x=-1 in equation 1,

y = x+7

=> y = -1+7

=> y = 6

<h3>The solutions are :</h3>

(0,7) and
(-1, 6)

<h2>Option D!</h2>

Vlad1618 [11]3 years ago

4 0

Answer:

Step-by-step explanation:

plugin 0 for all x's to find the y-intercept

A doesn't work because if you plug in 1 for x in the first equation you get 10 and for the second equation you get 8. 10 and 8 are not equal

when you plug in -1 for x in both equation you get -6

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Model For Depretiation

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Next year it will have a value of

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