1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
adell [148]
3 years ago
7

X + y = 2

Mathematics
1 answer:
liraira [26]3 years ago
8 0

Answer:

D. (3,-1)

Step-by-step explanation:

x + y = 2  \:  \:  \:  \:  \:  \: ..(1) \\ 2x - y = 7 \:  \:  \:  \: ..(2)

from equation 1 we get,

x = 2 - y

now,

put \:  \:  \:  \: x = 2 - y \:  \:  \: in \: (2)

we get,

2(2 - y) - y = 7 \\ 4 - 2y - y = 7 \\ 4 - 3y = 7 \\  - 3y = 7 - 4 \\  - 3y = 3  \\  \\ y =  \frac{3}{( - 3)}  \\  \\ y =  - 1

now,

put \:  \:  \:  \: y =  - 1 \:  \:  \:  \: in \: (1)

we get,

x + ( - 1) = 2 \\ x - 1 = 2 \\ x = 2  + 1 \\ x = 3

hence, the value of x = 3 and y = (-1)

You might be interested in
Find the slope and y-intercept of each equation<br><br>y = x - 3<br>m = ?<br>b = ?​
barxatty [35]

Answer:

m = 1

b= -3

Step-by-step explanation:

4 0
2 years ago
How do you simplify 2x + 2x -9 =15
vivado [14]

Step-by-step explanation:

4x-9=15

Solutuon

4x-9=15

4x=15-9

4x=6

x=6:4

x=1,5

8 0
1 year ago
Find f. (antiderivative) . f '(t) = 4 cos (t) + sec^2(t), −π/2 &lt; t &lt; π/2, f(π/3) = 3
ArbitrLikvidat [17]
The antiderivative of the function f '(t) = 4 cos (t) + sec^2(t) is determined by applying integral calculus. The antiderivative of 4 cos (t) is -4 sin(t) while the antiderivative of <span>sec^2(t) is tan (t). The total term is -4 sin(t) + tan (t). We try to replace pi/3 and the answer is 3.</span>
6 0
3 years ago
A shelf holds 3 novels, 2 biographies, and 1 history book. Two students in turns choose a book at random. What is the probabilit
Vinvika [58]
I'll do the first one:
Both novels.

Student 1 picks a novel. There are 3 novels out of 6 books total.

Now there are 5 books left.

Student 2 picks a novel. There are 2 novels out of 5 books since the other student took a novel.

To find the probability you would multiply the probability student 1 gets a novel and the probability student 2 gets a novel.

\frac{3 Novels}{6 Books} x  \frac{2 Novels}{5 Books} =   \frac{6}{30} =  \frac{1}{5}

So the probability is 1/5. Or 20%
6 0
3 years ago
The graph shows the relationship between liters and gallons
polet [3.4K]

It does?

Huh

Neat

We can't see it though

4 0
3 years ago
Other questions:
  • Can you plz solve this ​
    13·1 answer
  • Jack is selling wristbands and headbands to earn money for camp. He earns $2 for each wristband and $3 for each headband. He wan
    9·2 answers
  • 4. Given that 2x = 0.125, find the value of x​
    8·2 answers
  • What would the equation be? I give brainliest if correct
    14·2 answers
  • Which function is represented by the table?
    13·1 answer
  • I need it asap plzzz​
    15·1 answer
  • The population of New Town is increasing by 6% a year.
    7·1 answer
  • How do you play chess?
    5·1 answer
  • What is the mean deviation of 17,18,18,15,15,14,5,12,6,20
    15·1 answer
  • What is the equation of the verity line through (2 ,3)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!