Answer:
Step-by-step explanation:
<u>Given the system:
</u>
<u>Substitute y and solve for x:</u>
- 6x + 8y = 30
- 6x + 8(1/2x) = 30
- 6x + 4x = 30
- 10x = 30
- x = 3
<u>Find y:</u>
- y = 1/2x
- y = 1/2(3)
- y = 1.5
Solution is (3, 1.5)
Answer:
1 hour 56 minutes
Step-by-step explanation:
Given :
Time taken by Lucy = 3 hours 15 minutes = 3.25 hours
Time taken by brother = 4 hours 45 minutes = 4.75 hours
Rate = 1 / time taken
Lucy's rate = 1 / 3.25
Brother's rate = 1 / 4.75
Combined rate = Lucy's rate + brother's rate
Combined rate = 1/3.25 + 1/4.75
Combined rate = 0.5182186
Time taken if they work together = 1/ combined rate
= 1 / 0.5182186
= 1.9296 hours
= 1 hour (0.9296 * 60) minutes
= 1 hour 56 minutes (approximately)
It’d be 0.57, hope this helps.
20% of 65 is 0.2 times 65 which is 13.
Hope this helps.
N = 3
Step-by-step explanation: If you do the equation it comes out to n=4
n+3n=12
4n=12
n=3
You have to add the like terms then divide it so the variable is by itself. And whatever you do to one side, you have to do to the other
