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Ainat [17]
3 years ago
12

I'm trying to find out if the system have a unique solution, no solution or infinitely many solutions

Mathematics
2 answers:
Zielflug [23.3K]3 years ago
7 0
Both have no solution
kow [346]3 years ago
6 0
Alright so this is what you do.
You need to isolate one variable so that it is y = or x =
Lets go with y = for the first one

-x +3y = -6
x - 3y = 6

Isolate y = by adding x for the first one and then subtracting x from the second one.
3y = -6 + x
-3y = 6 - x

You would then divide the second one by -3 and divide by 3 in the first one.

y = (-6 +x) / 3
y = (6 -x) / -3
Since this is what y = you can put them together.

-6+x) / 3 = 6-x)/-3 (I put one parenthesis for convenience)

This equation is now set and you aren't done yet.
You can take out -1 from each side. This makes it no solution since you must always multiply by -1.
(6+x) / 3 = -1( (6+x) / 3)

Try the second one on your own!
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Jane used $68 more than two-fifths of her last paycheck to purchase a new surfboard. If the surfboard cost $289, find the amount
garri49 [273]

Answer:

552.5

Step-by-step explanation:

2/5x + 68 = 289

2/5 x = 289 - 68

2/5x       = 221

x = 221  * 5/2 = 552.5

I hope im right!!!

4 0
3 years ago
What are vertical angles always equal to
babymother [125]

Answer:

Vertical angles are always equal to one another. In general, we can say that, 2 pairs of vertical angles are formed when two lines intersect.

Step-by-step explanation:

Parallel lines are lines that do not meet at any point in a plane.

Intersecting lines are straight lines that meet or crosses each other at a certain point.

8 0
3 years ago
Jordan performed an experiment using a number cube. He rolled a number cube 50 times. He found that he rolled a 6 a total of 8 t
bazaltina [42]

Answer:

Step-by-step explanation:

Total number of rolls = 50

Number of times rolling a 6 = 8 times

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8 0
3 years ago
Given that the measurement is in centimeters, find the area of the circle to the nearest tenth. (Use 3.14 for π)
kvv77 [185]

Answer:

Option D) 254.3 cm2

Step-by-step explanation:

we know that

The area of a circle is equal to

A=\pi r^{2}

we have

r=9\ cm

substitute

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7 0
3 years ago
What would the graph of 10x + 7y < 49 look ?
navik [9.2K]

Answer: The graph is attached.

Step-by-step explanation:

1. Solve for y, as following:

10x+7y

2. The equation of the line in slope intercept form is:

y=mx+b

Where m is the slope and b is the y-intercept.

3. In this case the equation of the line is:

y=-\frac{10}{7}x+7

then:

m=-\frac{10}{7}\\\\b=7

4. Find the x-intercept. Make y=0. Then:

0=-\frac{10}{7}x+7\\\frac{10}{7}x=7\\x=4.9

5. Then, plot the line that passes through the points (0,7) and (4.9, 0).

6. The symbol of the inequality is < therefore, the line must be dashed and indicates that the region under the line must be shaded.

Then you obtain the graph attached.

8 0
3 years ago
Read 2 more answers
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