1.50 - 0.27 = 1.23 liters
Your answer is 1.23 liters will remain.
Answer:
37. {-1, -1}.
Step-by-step explanation:
I'll solve the first one . The other can be solved in a similar way. We can use the method of elimination.
x1 - x2 = 0
3x1 - 2x2 = -1
We can multiply the first equation by -2. We then have an equation containing + 2x2 so when we add this to the second equation the 2x2 will be eliminated
So the first equation becomes:
-2x1 + 2x2 = 0 Bring down the second equation:
3x1 - 2x2 = -1 Now adding, we get:
x1 + 0 = -1
so x1 = -1.
Now we substitute this value of x1 in the original first equation:
-1 - x2 = 0
-1 = x2
x2 = -1.
So the solution set is {-1, -1}.
If there are more than 2 equations you can use a combination of substitutions and eliminations.
456.89 would be 456.9 rounded to the nearest tenth.
Answer:
The ratio is 5:4 and the only one that fits is 25,20 so that's the answer.
Step-by-step explanation:
Answer:
You need to use A, B, and C.
Step-by-step explanation:
Let's treat the units as variables. I'll illustrate why in a moment.
Now, as you can see, we have a giant mess of units to deal with. This is where we can treat the units like separate variables and use a bit of algebra to make our lives easier:
So, backtracking through that entire mess, we had to use 
.
These correspond to the options of A, C, and B accordingly.
So you need to use A, B, and C.
