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3 years ago

If y=3x + 2, find the value of y when x = -3

Mathematics

2 answers:

Tatiana [17]3 years ago

7 0

Y=3x
y=3(-3)
y=-9

Hope this helped.... Sorry if it ends up being wrong!

Sergeu [11.5K]3 years ago

3 0

Y =3x + 2

y = 3 × -3 + 2= -7

y = -7

I hope this helps! :)

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3 years ago

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Parallel line:

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Perpendicular line:

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Step-by-step explanation:

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we can change it into y=mx+b form

$5y=-4x+19$

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so,

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we know that slope of two parallel lines are always same

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$m'=-\frac{4}{5}$

Let's assume parallel line passes through (1,1)

now, we can find equation of line

$y-y_1=m'(x-x_1)$

we can plug values

$y-1=-\frac{4}{5}(x-1)$

now, we can solve for y

$y=-\frac{4}{5}x+\frac{9}{5}$

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we know that slope of perpendicular line is -1/m

so, we get slope as

$m'=\frac{5}{4}$

Let's assume perpendicular line passes through (2,2)

now, we can find equation of line

$y-y_1=m'(x-x_1)$

we can plug values

$y-2=\frac{5}{4}(x-2)$

now, we can solve for y

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3 years ago