4 years ago

What do you need to know to find the area ABCD ?

Mathematics

2 answers:

Studentka2010 [4]4 years ago

4 0

Can you show me a picture, I need to know what shape and problem it is

Dafna11 [192]4 years ago

3 0

You need to know the width and lengthy

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3 years ago

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3 years ago

Write an equation of the line that is perpendicular to 3x + 9y = 7 and passes through the point (6, 4).

musickatia [10]

Hi there!

The equation of any line perpendicular to
$ax + by = c$
is
$bx - ay = c$

Therefore, in this situation, the formula of the line would be
$9x - 3y = c$

Given that the line passes through the point (6, 4) we get
$9 \times 6 - 3 \times 4 = c$
$54 - 12 = c$
$c = 44$

Therefore, the equation of the line that is perpendicular to 3x + 9y = 7 and passes through (6, 4) is
$9x - 3y = 44$