Answer:
Infinite solutions
Step-by-step explanation:
3(2d-1)-2d=4(d-2)+5 | Given equation
6d - 3 - 2d = 4d - 8 + 5 | Distribute
4d - 3 = 4d - 3 | Combine like-terms
4d = 4d
Infinite solutions, the terms are equal.
The first thing you should know is that you have a system of two equations with two unknowns.
Clearing we have:
y-x = 9
2y + 2x = -10
Step1: multiply equation 1 by -2
-2y + 2x = -18
2y + 2x = -10
Step2: add both equations:
4x = -28
x = -28 / 4 = -7
answer
The x-coordinate of the solution for the system of equations is x = -7
It is the second one down
Answer:
z = 30/23
Step-by-step explanation:
Solve for z over the real numbers:
6/z - 3 = 8/5
Bring 6/z - 3 together using the common denominator z:
-(3 (z - 2))/z = 8/5
Cross multiply:
-15 (z - 2) = 8 z
Expand out terms of the left hand side:
30 - 15 z = 8 z
Subtract 8 z + 30 from both sides:
-23 z = -30
Divide both sides by -23:
Answer: z = 30/23
It depends on what you draw. So I'd like to say C, because you could pull up all the white marbles the first few draws, or none the first few and every other marble. It really depends.
