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AnnZ [28]
3 years ago
9

Help!! ASAP!! Which ordered pair(s) are solutions to 3x − y = 1? Select all that apply.

Mathematics
2 answers:
tresset_1 [31]3 years ago
8 0

Answer:

A, B, and D

Step-by-step explanation:

Substitute all the coordinates into the equation. (x, y)

3(-2) - (-7) = 1

-6 - (-7) = 1

1 = 1

3(-1) - (-4) =1

-3 - (-4) = 1

1 = 1

3(0) - (1) = 1

0 - (1) = 1

-1 does not equal 1

3(3) - (8) = 1

9 - (8) = 1

1 = 1

Paul [167]3 years ago
8 0
The answr I think would be a,b and D
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bonufazy [111]

Answer:

y=

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2

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Rewrite equations:

y=

1

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x;−3y=

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Step: Solvey=

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xfor y:

y=

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Step: Substitute

1

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xforyin−3y=

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x+4:

−3y=

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x+4

−3

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x=

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x+4

−3

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x=

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x+4(Simplify both sides of the equation)

−3

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x(Add (-1)/2x to both sides)

−2x=4

−2x

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Step: Substitute−2forxiny=

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y=−1(Simplify both sides of the equation)

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x=−2 and y=−1

Step-by-step explanation:

Sorry if it is too confusing

5 0
3 years ago
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A. How many lines of reflection symmetry does this shape have? (2 points)
kvasek [131]

Answer:

A Hexagon


Step-by-step explanation:


4 0
3 years ago
What is 5q-4p+6=4q-8
seraphim [82]

Answer:

q=4p-14

Step-by-step explanation:

5q-4p+6=4q-8

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7 0
3 years ago
Given the system of linear equations.
Karo-lina-s [1.5K]

Part A:


x + y = 9

4x + y = 6


To solve this system using substitution, begin by isolating either x or y in the first equation. I'll isolate x.


x + y = 9

x = 9 - y


Substitute this expression (9 - y) into the second equation for x and solve.


4x + y = 6

4(9 - y) + y = 6

36 - 4y + y = 6

36 - 3y = 6

-3y = -30

y = 10


To find x, substitute 10 for y into either of the original equations.


x + y = 9

x + 10 = 9

x = -1


Finally, check all work by substituting the x- and y-values into each original equation.


x + y = 9   -->   -1 + 10 = 9   -->   9 = 9   -->   True

4x + y = 6   -->   4(-1) + 10 = 6   -->   -4 + 10 = 6   -->   6 = 6   -->   True


The answer for Part A is x = -1 and y = 10; (-1, 10).


Part B:


For graphing, it's easier to get the equations into slope-intercept form. Slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept. To get our equations into slope-intercept form, we must simply isolate y.


x + y = 9

y = 9 - x

y = -x + 9


4x + y = 6

y = 6 - 4x

y = -4x + 6


Now that we have our slope-intercept equations, we can easily graph them, since their slopes and y-intercepts are readily visible.



Let's start with the y-intercepts. They are (0, 9) and (0, 6). You can plot those points on the graph.


Now, the slopes. The slope of the first line is -1, this means it declines. To plot this, start where you plotted the y-intercept, count one unit down, and then one unit to the right, and plot that point. Continue doing that and connect the dots, and you will have plotted the first line. The slope of the second line is -4, so it also declines. For this line, count four units down, and then one to the right and plot that point. Likewise, continue this and connect the coordinates, and you will have your line. (See attachment for graph.)


The lines do indeed intersect at (-1, 10); our answer is verified by graphing.

5 0
3 years ago
A copy machine makes 84 copies in 3 minutes and 30 seconds, how many copies does it make per minute.
matrenka [14]

Answer:

24

Step-by-step explanation:

3 minutes and 30 seconds = 3.5 minutes

84/3.5 = 24copies/minute

4 0
2 years ago
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