Answer:
x = 1
y = -4
Step-by-step explanation:
y = -x - 3
y + 3 = -x
x = - y - 3
y = -7(-y - 3) + 3
y = 7y + 21 + 3
y = 7y + 24
-6y = 24
y = -4
-4 = -x - 3
-1 = -x
x = 1
Answer:
Yes, 5:7 and 5:7
Step-by-step explanation:
Answer: opposite of -5 is positive 5 so it’s choice C
1st Page
1. Don’t Know
2. Side
3. Feet
2nd Page
1.
Answer:
775
Step-by-step explanation:
We are given two equations in which we can perform systems of equations by putting these two equations on top of each other then solving for one variable:
x+y=15
x-y=25
Here, we can cancel out the y variable and get:
2x=40
x=20
Then we can put the x variable into any of the equations to solve for y (in this case I will use the equation x+y=15 so 20+y=15
y=-5
Now, we can solve by plugging both variables into 2x^2 - y^2 :
2(20)^2 - (-5)^2
800-25 = 775
I hope this helps!
