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Anna [14]
2 years ago
5

PLEASE HELP GIVI BRAINLIEST

Mathematics
1 answer:
fredd [130]2 years ago
7 0

Answer: B

Hope this helps ^-^

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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
PLEASE HELP PLEASE i don’t know how to do this
DochEvi [55]

Answer:

716.31454 and 228.01π

Step-by-step explanation:

Area = πr^2

π · 15.1^2 ≈ 716.31454

Area in terms of pi = 228.01π

Thank you for posting this question! If you feel my answer is correct, please mark Brainliest. If you need help with anything else, let me know! :)

8 0
3 years ago
Combining like terms: -7x+x HELP ASAP​
Svetllana [295]

Answer:

Hello!!! Princess Sakura here ^^

Step-by-step explanation:

When you combine like terms you see the ones that are similar then you add or subtract, depends on what the signs are. For this one -7x is similar to x so in this case you would add x to the -7x which will give you -6x.

5 0
3 years ago
What fraction is 125g of 1kg?
Effectus [21]
Fraction 125g of 1kg:

1 kg = 1000 gr
so, 
125/1000 = 1/8

hope this help
3 0
3 years ago
If there are 624 calories in 3 servings, how many calories are in 1 serving?
Harman [31]

Answer:

208 calories per serving

Step-by-step explanation:

Divide 624 by 3.

3 0
3 years ago
Read 2 more answers
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