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Levart [38]
3 years ago
12

Help. I don't understand what I'm supposed to do.

Mathematics
2 answers:
Agata [3.3K]3 years ago
7 0

Cindy, Beth, then Ari

s2008m [1.1K]3 years ago
3 0

Just order the people from least to greatest time. So it would be Cindy, Beth, Ari.

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Step-by-step explanation:

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2. Which of the following equations are perpendicular to 2y = -3x + 1 I. II. III. y=-x-1 - 2x + 3y = -5 2x + 3y = 2 (A) I only (
Novay_Z [31]

The equation in given as ;

2y = -3x + 1

This can be written as ;

y= -3/2 x + 1/2

This means the equation has a gradient of -3/2

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For perperdicular lines , the product of their slopes = -1 .This means if the other line has a gradient of m2 then : m1 * m2 = -1

So from the answers :

i) y= 2/3 x - 1 the slope is 2/3

m2 = 2/3

m1 * m2 = -1 -------check the if this is true by using the two values of gradient as;

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II.

-2x + 3y = -5

3y = 2x -5

y= 2/3 x -5/3 -----m2 here is 2/3

m1*m2 = -1

-3/2 * 2/3 = -1 -----this is true , so ----equation ii

iii)

2x + 3y = 2

3y = -2x + 2

y= -2/3 x + 2/3 -----m2 = -2/3

m1*m2 = -1

-3/2 * -2/3 = 1 -----this is not true,,,equation iii is not perpendicular to our equation.

so, equation i and ii are perpendicular to our equation .

Answer : B i and ii only

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1 year ago
In how many different ways can the curator of a museum arrange five of eight paintings horizontally on the wall?
Y_Kistochka [10]
8C5=8!/(3!5!)=56
There are 56 ways a curator can arrange the paintings.
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2 years ago
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