Complete the square for x and y.
7x^2 + 3y^2 - 28x - 12y = -19
7x^2 - 28x + 3y^2 - 12y = -19
7(x^2 - 4x) + 3(y^2 - 4y) = -19
7(x^2 - 4x + 4) + 3(y^2 - 4y + 4) = -19 + 28 + 12
7(x - 2)^2 + 3(y - 2)^2 = 21
Since there are two cards that have at least one green side, the chance of the other side being green is 1/2.
Answer:
x>2
Step-by-step explanation:
This is true.
These are perfect squares: 4, 9, 25. These are not: 7, 8, 11
Answer: B, C, and D
Step-by-step explanation:
Just did it and got the answers wrong so these are the correct ones