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Lyrx [107]
3 years ago
11

What is the solution to -x+3y=2 X+y=-2

Mathematics
1 answer:
kozerog [31]3 years ago
7 0
In slope intercept form they are...

-x+3y=2 is y=1/3x+2/3

x+y=-2 is y=-x-2
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When you solve a word problem involving a quadratic equation which of the following is not a number of solutions can you possibl
Nady [450]
It depends on the value of the discriminant of the quadratic.  

If you are familiar with the quadratic formula...

x=(-b±√(b^2-4ac))/(2a)

The part under the radical sign (b^2-4ac) is called the discriminant of the quadratic  (of the form ax^2+bx+c)

If the discriminant is less than zero there are no REAL solutions  (however there are two imaginary solutions)

If the discriminant is equal to zero, there is just one solution

If the discriminant is greater than zero, there are two real solutions.

So depending on context, if you are to exclude imaginary solutions (which we often do) you can have 0,1, or 2 real solutions.

However you will NEVER have three solutions. (real or imaginary)
6 0
4 years ago
Read 2 more answers
George bought a broken bicycle. He repaired it and sold it for $85. This was $20 more than twice what he paid for it. What was t
bonufazy [111]
The answer is 22.50 dollars.
6 0
3 years ago
82 young musicians attended a jazz camp. 35 of them were singers.
olga55 [171]

Answer:

35/82 is the probability of picking a singer

5 0
2 years ago
Please help!
Aloiza [94]

Answer:14%

Step-by-step explanation:

final grade score=a

20% of a=15

20/100 x a=15

20a/100=15

Cross multiply

20a=15 x 100

20a=1500

Divide both sides by 20

20a/20=1500/20

a=75

B% of 75=10.5

B/100 x 75=10.5

75B/100=10.5

Cross multiply

75B=10.5 x 100

75B=1050

Divide both sides by 75

75B/75=1050/75

B=14

7 0
3 years ago
a tree casts a shadow that is 18 feet in length. If the angle of elevation is 28 degrees, which of the following best represents
pishuonlain [190]
Check the picture below

make sure your calculator is in Degree mode.

3 0
4 years ago
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