C is the answer 12 marbles and 20 marbles
180 degrees - 115 degrees = 65 degrees
65 degrees + 90 degrees = 155 degrees
180 degrees - 155 degrees = y
Y= 25 degrees
Answer:
D
Step-by-step explanation:
I can explain if you need. Write in comments if you do need.
Answer:
x = 7
Step-by-step explanation:
Distribute the 2 on the right and the -1 on the left: 13 - 2x - 2 = 2x + 4 + 3x
Combine like terms on each side of the equation: 11 - 2x = 5x + 4
Add 2x to both sides, and subtract 4 from each side: 7 = 7x
Divide both sides by 7: x = 7