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padilas [110]
3 years ago
10

Find y by itself 7y=14x-21

Mathematics
2 answers:
vlada-n [284]3 years ago
8 0

Answer: y=2x-3

Step-by-step explanation:

divide both sides by 7

7y/7=(14x-21)/7

y=2x-3

vekshin13 years ago
6 0
7y=14x-21

Divide both sides of the equation by 7

Y=2x-3 is the final solution

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Which of the following points lies on the line perpendicular to
sergij07 [2.7K]

Answer:

Step-by-step explanation:

recall that perpendicular lines have slopes that are opposite reciprocals. if u don't know what opposite reciprocals are, according to study.com they are, "The term opposite reciprocals refers to two numbers that have opposite signs and are flipped fractions of each other." for example, 1/2 and -2 are opposite reciprocals.

also recall that the formula to find the slope of a line is m=y2-y1/x2-x1

to solve this problem, we need to go through all of the options and find the slope of that line using the given point and point (0,4). After that, we need to check if that slope is equal to 1. One is the opposite reciprocal of -1, and -1 is the slope of the equation y= -x+4. if the slope is equal to 1, the line will be perpendicular to the line y= -x+4.

lets do the math now:

option a)

m=y2-y1/x2-x1

m=12-4/6-0

m=8/6

m=4/3

this line isnt perpendicular to y= -x +4 cuz the slope is 4/3, which isnt equal to 1

option b)

m=y2-y1/x2-x1

m=0-4/6-0

m=-4/6

m= -2/3

this line isnt perpendicular to y= -x +4 cuz the slope is -2/3, which isnt equal to 1

--------------

ok girl i dont wanna do all the rest of the calculations. just keep doing the same thing with all the other options until you find something that has a slope of 1.

toodles! :)

6 0
3 years ago
Your teacher wants to encourage you to work harder. Which measure should your teacher use? Explain.
Paul [167]

Answer:

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Step-by-step explanation:

7 0
3 years ago
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Which property can be used to solve the equation?<br><br> 5 d = 75
timama [110]

Answer:

Division

Step-by-step explanation:

To isolate d and solve the equation, divide 75 by 5.

4 0
3 years ago
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8(39 + 11)
Andrei [34K]

Answer:

option D is the correct answer

6 0
2 years ago
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Triangle X Y Z is shown. Angle X Y Z is 51 degrees and angle Y Z X is 76 degrees. The length of X Z is 2.6, the length of X Y is
stepan [7]

Answer:

z=3.2\ units

Step-by-step explanation:

we know that

In the triangle XYZ

Applying the law of sines

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solve for z

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3 years ago
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