Answer:
The question is missing, so I will answer all the solution for each possible system of two equations.
Step-by-step explanation:
The equations
x + 5 y = 10 (red)
3 x - y = 1 (blue)
x - 5 y = 10 (green)
3 x + y = 1 (purple)
are shown in the picture atatched. The intersection between two lines is the solution of their system.
<u>system:</u>
x + 5 y = 10 (red)
3 x - y = 1 (blue)
<u>solution</u>: (0.938, 1.813)
<u>system</u>:
x + 5 y = 10 (red)
x - 5 y = 10 (green)
<u>solution</u>: (10, 0)
<u>system</u>:
x + 5 y = 10 (red)
3 x + y = 1 (purple)
<u>solution</u>: (-0.357, 2.071)
<u>system</u>:
3 x - y = 1 (blue)
x - 5 y = 10 (green)
<u>solution</u>: (-0.357, -2.071)
<u>system</u>:
3 x - y = 1 (blue)
3 x + y = 1 (purple)
<u>solution</u>: (0.333, 0)
<u>system</u>:
x - 5 y = 10 (green)
3 x + y = 1 (purple)
<u>solution</u>: (0.938, -1.813)
Answer:
400
Step-by-step explanation:
Tge 6 in the tens place is greater than 5, so you round the 3 up to 4.
Answer: 12 minutes
Step-by-step explanation:
This is a standard Work Formula question (2 or more 'entities' that work on a task together). When there are just 2 entities and there are no 'twists' to the question, we can use the Work Formula to get to the correct answer.
Work = (A)(B)/(A+B) where A and B are the individual times needed to complete the task.
We're told that two hoses take 20 minutes and 30 minutes, respectively, to fill a pool. We're asked how long it takes the two hoses, working together, to fill the pool.
(20)(30)/(20+30) = 600/50 = 12 minutes to fill the pool.