Answer:
b = 4
r = 3
Step-by-step explanation:
r + b = 7
solve for 'r' to get r = 7-b
now substitute '7-b' for r in the second equation:
3.75(7-b) + 2.75b = 22.25
26.25 - 3.75b + 2.75b = 22.25
-b = -4
b = 4
r = 3
6. 150 degrees
7. 70 degrees
8. 100 degrees
150+(.10)x+x=200
.10x+x=50
1.10x=50
x=45.45454545
Answer:
About 71% of Earth's surface is covered in water.
Step-by-step explanation:
About 97% of Earth's water is salt water.
About 3% of Earth's water is fresh water.
Answer: (0,-3/5)
Step-by-step explanation: Hope this helps