The answer is A.
USE PYTHAGOREAN THEOREM
3^2+6^2=c^2
9+36=c^2
45=c^2
c=3 sqrt5
If George's bike weighs 15 pounds, then we can say that because Obed's bike is 3 pounds heavier than George's, Obed's bike weighs 18 pounds. If Obed's bike weighs 18 pounds, then we can say that because Elsa's bike is twice as heavy as Obed's, Elsa's bike weighs 9 pounds.
Answer:
(2,-1)
Step-by-step explanation:
Multiply first equation by 2:
10x + 2y = 18
Subtract the second equation from this so that the 2y terms cancel:
10x - 3x = 18 - 4
7x = 14
x = 2
Plug into first equation to find y:
5(2) + y = 9
10 + y = 9
y = -1
The answer is (2,-1)
Answer: 
<u>Step-by-step explanation:</u>
1st marble and 2nd marble
4/10 and 6/10
(40% and 60%)
