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oksano4ka [1.4K]
3 years ago
15

Solve by graphing : -x + 3y = -9 y = -x + 1

Mathematics
1 answer:
mafiozo [28]3 years ago
7 0

Step-by-step explanation:

the answer from the graph is;

(3 , -2)

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Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. 2x-y=
Bond [772]

Answer:

The system of linear equations has infinitely many solutions

Step-by-step explanation:

Let's modified the equations and find the answer.

Using the first equation:

2x-y=5 we can multiply by 2 in both sides, obtaining:

2*(2x-y)=2*5 which can by simplified as:

4x-2y=10 which is equal to:

4x=2y+10

Considering the second equation:

=4x+ky=2

Taking into account that from the first equation we know that: 4x=2y+10, we can express the second equation as:

2y+10+ky=2, which can be simplified as:

(2+k)y=2-10

(2+k)y=-8

y=-8/(2+k)

Because (-8) is being divided by (2+k), then (2+k) can't be equal to 0, so:

2+k=0 if k=-2

This means that k can be any number different than -2, and for each of these solutions, there is a different solution for y, allowing also, different solutions for x.

For example, if k=0 then

y=-8/(2+0) which give us y=-4, and, because:

4x=2y+10 if y=-4 then x=(-8+10)/4=0.5

Now let's try with k=-1, then:

y=-8/(2-1) which give us y=-8, and, because:

4x=2y+10 if y=-8 then x=(-16+10)/4=-1.5.

Then, the system of linear equations has infinitely many solutions

8 0
3 years ago
Karen has 216 role-playing game cards. His goal is to collect all 15 sets of cards. There are 72 cards in a set. How many cards
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What is the solution to the system of equations below? y= -3/4 x + 3 and y = –12 (20, –12) (12, –12) (–6, –12) (–12, 12)
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Answer:

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Step-by-step explanation:

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Gnom [1K]

Answer:

6.2*6*6*6*6=8035.2

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2 years ago
Find the difderence of 3/4 and 1/28​
valentinak56 [21]

Answer:

5/7

Step-by-step explanation:

3/4-1/28

21/28-1/28

20/28

simplify

5/7

4 0
2 years ago
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