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dybincka [34]
3 years ago
12

What is the equation of the line parallel to x = 7, passing through the point (-4, 1)? A. X = -4 B. X = 1 C. Y = -4 D. Y = 1

Mathematics
2 answers:
77julia77 [94]3 years ago
6 0

Answer:

x=-4

Step-by-step explanation:

marysya [2.9K]3 years ago
6 0

Option A

<u>Answer:</u>

The equation of the line parallel to x = 7, passing through the point (-4, 1) is x = -4

<u>Solution: </u>

Given that the line is parallel to x = 7 and passes through the point (-4, 1)

we have to find the equation of the line.

Step 1:

x=7 is the equation of a vertical line parallel to the y-axis.

Thus a parallel line will have equation x = c

Where c is the value of the x- coordinate the line passes through.

Step 2:

The line passes through (- 4, 1) with x- coordinate of - 4, thus

x = - 4 is the equation of the parallel line.

Result:

Thus the equation of the line parallel to x = 7, passing through the point (-4, 1) is -4.

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A musical instrument has a pitch of 220 hertz when the wavelength is 3 feet. When the wavelength is 4 feet, the pitch is 165 her
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We know that
Inverse Variation is a relationship between two variables in which the product is a constant
so

let
x------> a pitch of a musical instrument
y------> the wavelength
x*y=k

find the value of k
for x=220 hertz   y=3 ft
x*y=k
220*3=k
k=660

for x=165 hertz   y=4 ft
x*y=k
165*4=660
k=660

the answer part a) is
the type of variation between pitch and wavelength is an inverse variation

part b) What is the pitch when the wavelength is 5 feet?
x=?
y=5 ft
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x*y=k------> solve for x
x=k/y----------> x=660/5-----> x=132 hertz

the answer Part b) is
132 hertz
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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