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GREYUIT [131]
3 years ago
11

Find an equation of the line. Write the equation using function notation.

Mathematics
1 answer:
seropon [69]3 years ago
4 0

Answer:

y=-6x+33

Step-by-step explanation:

Perpendicular lines meet the following condition:

m1*m2=-1

From the first line equation, we obtain m1 if we write the given equation in a proper manner. 6y=x-12 becomes y=x/6 -12,

m1=1/6 since is the coefficient of 'x' variable.

Now, to obtain 'm2' we use the condition for perpendicular lines

(1/6)*m2=-1

m2=-6

Thus, our new line have an equation like the following y=mx+b, where m=-6

Now, we need to eval the given point (6,-3) in the equation in from above to obtain the value of 'b'

-3= -6*(6) + b

Leading us to, b=33

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What happens to the mean of the data set {2, 4, 7, 6, 3, 6, 7} if the number 25 is added?
Margaret [11]

Answer:

It goes up by 2.5

Step-by-step explanation:

Mean equation: (n₁ + n₂ + n₃ + ...)/n

Current mean: (2 + 4 + 7 + 6 + 3 + 6 + 7)/7 = 35/7 =<em> 5</em>

New mean: (2 + 4 + 7 + 6 + 3 + 6 + 7 + 25)/8 = 60/8 = <em>7.5</em>

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8 0
3 years ago
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A rectangle has a length of 12 yards less than 3 times its width. If the area of the rectangle is 135 square yards, find the len
Aleonysh [2.5K]

Answer:

The length is 15 yards

Step-by-step explanation:

Given

Represent the width with W and length with L: So

Area = 135yd^2

L=3W - 12

Required

Determine the length of the rectangle:

Area is calculated as thus:

Area = L * W

Substitute 3W - 12 for L and 135 for Area

135= (3W - 12) * W

135= 3W^2 - 12W

Reorder:

3W^2 - 12W - 135= 0

Divide through by 3

W^2 - 4W - 45 = 0

Expand:

W^2  - 9W + 5W - 45 = 0

W(W  - 9) + 5(W - 9) = 0

(W + 5)(W-9) = 0

W + 5 = 0 or W - 9 = 0

W = -5 or W = 9

But width can't be negative

So:

W = 9

Recall that: L=3W - 12

L = 3 * 9 - 12

L = 15

<em>Hence, the length 15 yards</em>

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